GB/T 4945-2002 Determination of acid and base value of petroleum products and lubricants (color indicator method)
Some standard content:
ICS 75.080
National Standard of the People's Republic of China
GB/T 4945—2002
Staodard test method for acid and hast numbcruf petruleum products and lubricants hyColour-indicator titration
2002- 01- 14 Issued by
The General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
2002-08-01Implementation
CB/T49452002
In accordance with the national test and village and association standards, it is difficult to adopt the standard method for the determination of the neutralization value of petroleum products by acid elimination and test (color indication method) 3.6B404518511991 petroleum products profit intelligent agent neutralization value determination method (break color indication method) for determination,
The difference with ASTM13741997: The standard name is different. ASTM74-1S5? The name of the standard is the acid value reduction determination method (it refers to the acid value reduction method 3.m. The name of the international standard is the oil output and lubricant glue and magnet determination method (color indicator method). This standard is for 45-9H11. Key points:
: The standard product and the lubricant color indicator method (the indicator should be 2.2, and the total acidity should be reduced to the entire value.
3. The effective potassium hydroxide should be weighed along the full-strength potassium hydroxide in the standard preparation method 5. The standard charcoal with scraped off the difference is sufficient to meet the requirements. This standard is issued by the Petroleum and Chemical Industry Bureau of China: China Petrochemical Industry Investment Co., Ltd. This standard is issued by the PetroChina Petrochemical Industry Investment Co., Ltd. Sichuan Branch, Lanzhou Development Center, and the main initiators are Liang Dongzhou, Zhou Ye, Fan Gaojun. Standard section issued: Year 1 Scope National Standard of the People's Republic of China Determination of acid value and loss of petroleum products and lubricants (color indicator method) Standard test ethad for acid and liase nnihernf petrnleum prnducts and lubrirants hyColaur-indicatar titration
B/14945—2002
±GB/T49:5-1595(1951
1.1 Standard for determination of the hazardous substances in benzene and isocyanate in oil products: Suitable for determination of the solvent constant greater than U-1: The solvent constant is less than 1-1 and does not affect the quality of the oil. If the number of hydrolysis bands of salts is greater than 1, the impact of 1,000, white
in the new and lost through the exchange of ten standards is considered and there are proof of sexual activity, including organic awakening, sufficient analysis, before. The English culture. The same can be shown, the weight of the salts and the net moment, the female antibiotics and detergents. Similarly, the inspection is considered that the existence of H is clear after the package, the heart machine with the board cost compounds. The age of the salt fluorescent enough). The child's donation, the raw material of the donation, such as the anti-inflammatory agent, the Taiwan level of the request, this method 1. The oil is not marked with a mark to indicate the difference between the oil under emulsified conditions: even if the oil is not marked under specified conditions, it is difficult to formulate an absolute acidity and acidity standard to predict the performance of the product under the specified conditions. It has been reported that the acidity value has no necessary connection with the bearing.
Juice: Some lubricants, blood-beating oils, anti-inducing oils and similar simple oils South-European clean Color oil products: Indications: Punishment to the end point of the small obvious, not far from the Sichuan Fang public bacteria unit, can! 7A natural recovery activity adjustment, color when the small legal acid value, enough T01 station, etc., the indirect control agent method is equal to the test report in the purchase 1, but the effectiveness and performance indicators are fixed and 2 reference standards || tt || The following standards are included in the text, and are suitable for use before the release of part of the standard. Unless otherwise specified in this standard, the following reference standards should be the existing valid standards.
G7T6682 Analysis of water for aging room Specifications and test methods 5U Stone test products and intelligent acid value measurement flow (return to the determination) SI/T6SS Individual products private moisturizer alkali value determination method (potentiometric titration method) 3 Definitions
This standard adopts the following definitions.
31 Maozuo icid aimher
Liquor 1 Sample specification and the required quality, in O table 3.2 Value bacr
Full specification 1 Sample specifies the required end point, in clothes: Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 200211-14 2002-08-01 Buy auction
3.3 Strong stogaidumben
G:B/T: 4S15---7002
To form a liquid carle agent. 1 test in detail in the heat of the small draw money contention Mao package A required drug purchase amount. In KH/I show: 3.4 used soil
In the running + running equipment such as engine, gearbox, instrument or steam turbine in the dynamic! . 4 method summary
When determining the acid value or reducing the test solution containing less water currency and isocyanate, make it a pair of factors and bath system, under the same conditions, respectively, with standard reduction or comparative drug alcohol rate determination. The end point is indicated by the addition of a chemical sample of the suspension, which shows a green color in the sample and a green color in the sample. When determining the acid level, the sample is extracted with hot water. The extracted sample is titrated with a standard solution such as potassium hydroxide, and bismuth is used as an indicator. 5 Significance and Use
5, New and tried petroleum products contain some acidic or degradable components, which are in the form of additives or modified substances such as oxidation products. The content of these substances can be determined by using an acid-based degrading solution. Regardless of the number of acid samples, the sample contains the maximum amount of the substance under the test conditions. These values can be used as references and are sometimes used to control the quality of the composition and measure the degradation degree of the lubricating oil. However, the lower limit of tolerance must be based on experiments.
5.2 Since the oxidation products of various materials may affect the test value, and the change of organic acidity is also reported, this method cannot express the toxicity of the product under the conditions of use. There is no real correlation between the acid value and the product's performance. The engine oil with composite additives is measured by this method. The test results can be estimated and the equipment required is:
6.1 Flow tube, graduation value (0ml.., ml.. or 10nT.. The titrant output can be controlled at 3%m or less. The titrant output can be controlled at 3%m or less. The titrant output is a new data set listed in this standard.
6.2 Bottle: 25ml or 300l..
6-3 Drop source 4.25ml..
E.5 Burning Fine yarn broken again -- into a new bucket, the agent
7.1 monitoring acid: analytically pure, relatively narrow 1.25, 7.2 potassium hydroxide: analytically pure
7.3 alcohol: analytically pure
7.4 water: GB first level
7.5 second level: standard agent
76 years of chemical measurement, comprehensive analysis.
7.7 level: new.
8 test preparation
8.1 paint and agent
8.1.1 standard acid dissolution: 0,1m0./1.9m hydrochloric acid 1>1 mixture. Accurately measure 0.mol/ml ammoniacal propanol standard solution GB/T4945--2002
m! Add 25ml of water without carbon monoxide, use the injection liquid standard as the titrant, and calibrate by the centrifugal calibration method. The calibration error is not more than 0.0005mol/1.12). The condensate is calibrated with the following formula: the calibration error is not more than 0.0000mol/1.12 ...4. Add nearly 11% isopropyl alcohol (standard concentration of 4-1/2 mol) of solid potassium peroxide to a 2-ml bottle and allow the mixture to slowly evaporate and stir to prevent solid caking at the bottom of the bottle. Add at least 50 ml of the oxidizing agent and cool in a room temperature for at least 2 hours. Filter the upper layer through a fine glass funnel and filter through a filter. Avoid prolonged exposure to the chemical during the process. Store the chemical in a reagent bottle that is not cork or oxidizable and protect it with a fiber-free tube. Potassium hydrogen ion can be easily determined: the calibration method is as follows: weigh about 0.1 mg in 110 °C potassium hydroxide, with a concentration of at least 1 mg/mL, in water that does not contain 10% carbon dioxide, use a room temperature chemical guide to determine the point at any of the following concentrations, when calibrated by the median reduction method, the potential of the solution reaches a certain limit (h); when calibrated by the color indicator method, the amount of indicator drops to a certain level, and a pink color appears continuously. It is used to titrate the solution in water with a constant amount of hydrogen ion. The standard information of potassium oxide is shown in the formula (o/.) 1) Calculate: Ms:
Where: W-formic acid hydrogen urea
one point
consumption determination type of titrant plate ·EL-lubricating hollow required to fill the full product, mL【oxygen has chemical and when people are weaving the development of error. Oxygen can also be used to cut through the heart and perform electric performance. It is also a skin medicine. Naturally, it is poisonous to inhale. 1
3 mountain one machine Ji Senle system effect slope is large-such as isopropyl alcohol, because the standard alcohol must be double in the alcohol when the composition is close, the hospital calibration
6-1.5 acid enemy indicator format
will be 1 person pure to reach S:. Alcohol I, in the request of dioxide. 6-1-E drops of blue corrector
5l of extract and l. water
Note, the preparation of the oil sample for the heat source and spark machine on the first day of the 2nd day
B.2. Sampling is carried out strictly according to the description in 8.2.2. This is for the rapid development of the Shantou product 11. There is usually no precipitate. The precipitate is only the acid or degradable substance, and some of them are non-sensitive components absorbed from the product. 8.2-2 Heat the sample 1 in the main container to (2) until all the sediment is evenly distributed in the oil pool. If the container is not transparent, or the sample volume exceeds one-fourth of its total volume, transfer all samples to a glass bottle. The sample volume must be at least one-fourth larger than the total volume. All samples must be removed to ensure that all sediment is transferred to the plate. After all sediment has completely floated, pass the sample or part of the sample through a 1m (100-day) sieve to remove large contaminants. The product flow is averaged and the filter is connected to the name,
? F Any 1 has passed the welding answer product to determine the north, from the full slip original late work to the original late also stand-alone analysis, select the method to buy group and test ns,
9 value determination step tight
9.1 in 251 [standard (in, the right to refuse the provisions of Table 1 will take the test belt, add 100m. titration agent and 0.5m to - Meng Ping small agent drop effect, shake it until the test is completely full of the sieve agent drop solution blood if the compound is some of the goods color · press! 2 step operation, if it becomes green package instant her color · nuclear 13 pull, 1
joint value or limit / (m.RKOH music
. - 3.
: 3, 3--y5. n
25. >- 25n, n
G: t:--?5.
22.. ~ 1:fn
New or light oil
20. ± 2.
.2-r.02
Used dark color
0. 2=0. 02
said the oil is low, weigh 20 single oil color to reduce the specified amount of oil formula to reduce the darker than the start,
5.2 immediately at 30, avoid adding 0.1r/. isopropanol standard hydroxide to gradually settle, near the end point, to remove the aldehyde to ensure that the oil is in the wet state, the color turns green to indicate that the end point is near). The color change can last: 5* or 3.1m. The salt can lead to the internal standard solution to make the color return to the original color, which is considered the end point. Note: The dark oil product should be hydrated with water, and then the standard solution should be added. When it is 10% molten, the color of the product should be observed under the light of the test lamp. 9.3 White test
In the 15% drop of the indicator, the amount of C.. or D. 1/L propylene glycol monohydrogen phosphate should be added to the tube again to indicate the drop of the indicator. The volume of the standard filter required at the specified point is: Note: The required amount of the bath reagent will be determined by the quality of the test solution. I must red distribute cattle reaction: for the control of the acid in the wine flow of the selected product,
10 alkaline value to determine the step
10.1 such as hand containing flash drop Le potential liquid 4 add people to - tea age benzene show all the guests stimulate the total effect of the product in the range of (with 1.1 / . isocyanate standard swim titration, with the source of color or surprise color.102 case test happy: dial 9.3 release the air from full: 11 strong acid value determination steps
11 .1 left and right sides of the test group, add 1.1 ml of boiling water, use the method: in the stratified water sweep effect of the sample more than 50 times, the dosage is 50m. All the extractions are placed in the format of 3D images, in the final analysis, if only the color turns red or red according to the instructions of CB/T4945-2002
, then titrate with 0.1% potassium peroxide standard solution until it becomes red. If the color of the added solution is not red or pink, then use 1/10 mol/l of the standard alcohol solution to determine the color of the test solution. 11.2 Blank test: Add 25 ml of water to the test column and add 1/2 mol of methyl alcohol. If the color is yellow, add 1/10 mol/l of the standard alcohol solution and titrate to the test point. If the color is pink or red, use 1/10 mol/l of the standard alcohol solution to determine the color of the test solution. 12 Quality control inspection: A quality control system is used to ensure that the equipment or products used by the manufacturer are operating normally. For example, when any batch of samples has been tested or after a certain number of single products have been tested, a control chart technique can be used to analyze a follow-up product to ensure the accuracy of the analysis results. When the test results are obtained on a certain sample, the instrument can be calibrated with the a posteriori limit values. The QC samples should correspond to the individual samples on a daily basis and should be uniform and stable under harmonious conditions. If possible, the QC average report should be representative of the samples analyzed and should be determined before the equipment is tested. There is no standard deviation and protection limit range. The precision of the Q column product must be consistent with the standard quality and environment given by the method to prove that the instrument is operating correctly.
Design: The product will be changed by the company's thinking. The material of the product may be the source of error. 13 Calculation
13.1 Sample (gH/g) according to the formula (2 calculation:
relative value = A-
drop is the basis for the chemical evaluation of the two standards. 2), one titration of the required oxygen standard rate (3. 3) 1n-hydroxylamine and propylene glycol standard solution. 0!w
Chemical quality of the base solution
13.2 sample source (mkJH/g/number (3) or formula (4) calculation: 132.1 such as monthly acid titration:
(CMFm:xe.1iW
Where: C-titration of sample water rate required for oxidation County post difference to make the standard solution 11.1ml. Laboratory oxidation evaluation of alcohol standard symptoms of the micro-drop, mn.M
, a agreed air drop The concentration of the standard solution of hydrochloric acid is 112:1/1.2: the concentration of the standard solution of propanol. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1. The sample is oxidized to the concentration of 1.1-1.2m1.3 Carbon value of the sample (gKOH/g> calculated according to the formula: Carbon value = Em+FM)》ei!W
In the formula; E
Salt required for titration of the sample: Salt concentration of the isopropanol standard solution [10)mL instrument: The concentration of the isopropanol standard solution, mol/1.1F - Potassium hydroxide required for titration of the blank acid isopropanol solution, mL: The net concentration of the hydrogen ionized isopropanol standard solution, mol/! - Sample size g:
Kurt time of potassium oxide, ral.
14 Special Molar Error
14.1 Precision
The results of the new test shall be judged according to the following provisions (95% confidence level, .5
14.1.1 Repeatability The difference between the results obtained by the same operator in the same experimental case using the same instrument for the same test should not be greater than the following values.
Acid (strong) or base value, mgKOH/s
0. H~(. 1
G.1-~0. 3
*C, 5--1.0
1.0~-2- 0
E&.mgKOH/g
14.1.2 Reproducibility: The difference in individual results obtained by different simulations on the same sample at different temperatures shall not be less than ten times the stimulation value (strong acid value or oxidative value, mgKUI1/g
.00~-C.1
2-). 1~0. 5
20. 5.~2, 0
Positive performance, g
15% of the average value
1 These refer to the shop afraid of not suitable for dyeing, people transport some color sub-chemical works: 2 The car square reaches the relevant use of the instrument print ten new, mature package modification, seek power to obtain the mineral and new added with the steam turbine oil: 3 According to the listed instrument is to use the manual flow of some actions before use and use the self-determined tube to determine the results may be the same, to look forward to the technical time. 14.2 Bias
This method has no bias, because the acid value can only be determined by this method. 15 Notice
Take two more results of the test and estimate as the test result, E
11 Specifications
A1. 1 External strength: red non-instrument service,
A1.2 Chemical properties: quantity less than 0
GB/T 49M5-2002
Appendix and
Standard Specifications of Para-enzyme A13: Rate of Newness: 10 Details Product Requirements 11. The full specification of the product is required, A.4 Crown small absorption elimination is determined.! UR sample is dissolved in = L of alcohol. Take this drop, dilute the sample to \m with a 1r thick absorption cell, water as the air liquid, and the minimum value of the specific release at the 650rm peak is 1.: A1-5 Range
A1. 51 When the indicator is tested before the incremental method is used, the indicator will rise and change to a completely different color at II=11+5.
A1.5.2 The indicator will begin to change to a completely different color at the position of (.0110./T). The potassium hydrogen cyanide standard liquid cannot pass through the blank test.
A1-5-3 The indicator is blue as shown in the U11m written in the hydrogen cyanide cabinet. The standard density coat can quickly pass through the blank test required by I.(rt..
Standard 1.5.4 The indicator liquid must be at least observed and changed to a high color. A1.5.5 The 5 ml of 0.5 mol/l sodium dihydrogen phosphate solution is diluted with 26.9 mol/l sodium violet oxide solution to obtain a pH value within the range of 1.1 mol/l. A2.1 Method for determining the pH value of a non-indicating instantaneous indicator is used to determine whether the color of the solution changes over different pH ranges. 12.2 Method
Hr is an artificial term used to indicate the relative activity of the aqueous medium in isocyanate-water. The range of application of this method is the standard Hr determined by measuring the pH value of the sample water sample at the time of the test. A2-4 Procedure
This method is used to establish the Hr corresponding to different chemical reactions. A2.5 instrument
monthly meter, glass electric rectifier, H from, stirrer, sintering rod, T operation (37324 method provisions in accordance with the test, A7.E reagents
Xu test the test points of pure water are the first-class water standard. 2.5: chemical material two barrier liquid (0.2ma1/! connection/T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of pressure benzene agent = ml. of technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Push buffer solution PH = 4.0>, according to S/7HC4 deep storage. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 flashes. A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6. 7. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument A2-B-1 Before each test or batch test, place the potential on the H grid and place the electrodes in a non-conductive medium. The potential is 25-2°C and the potential is adjusted when the H is changed. Adjust the potential of the instrument to make the potential readings correct. B.2 Remove the acid-generated residue, rinse the electrolyte with water, and rinse the electrolyte with alkali water. The temperature is 25-2℃ and the dripping liquid is rinsed. When the 1H electrometer reading is stable, record the correct value. If the reading value is between 11.0 and 11.2, the initial acidity of the solution can be obtained by consulting the potentiometer dial. If the selected value is not between 11.0 and 11.2, press A1 to convert the potentiometer to the initial acidity. In the water-sugar treatment wave, in the
, in the The calibration curve of the non-small stock is as follows: A2.9 Test frequency A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide solution until the value of the standard solution is between 13.14 and 14.2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrode, add 0.01 1. When the Hr displayed by the full potentiometer is between 13 and 1.1, record the corresponding pH value and the volume of U,0101/1.4 chloride and isopropanol standard solution when the color changes at different times: record the volume of the indicator solution consumed when the color changes to 1.01mnl/1.01mnl/1.2.9.4 Continue the titration in the same way as above. Record the volume of GR/T 4945/11/isopropyl hydroxide standard solution consumed when the color changes to the specified color. A2.10:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator chamber should be in accordance with the requirements of A1.-? and A1.5.3.Net concentration of standard hydrogenated propanol solution, mol/s - Sample size g:
KOH value, mgKOH/s
14 Specific molar difference
14.1 Precision
The results shall be determined according to the following provisions (95% confidence level, .5
14.1.1 Repeatability The difference between the results obtained by the same operator in the same experimental case using the same instrument for the same test shall not be greater than the following values.
Acid (strong) or base value, mgKOH/s
0. H~(. 1
G.1-~0. 3
*C, 5--1.0
1.0~-2- 0
E&.mgKOH/g
14.1.2 Reproducibility: The difference in individual results obtained by different simulations on the same sample at different temperatures shall not be less than ten times the stimulation value (strong acid value or oxidative value, mgKUI1/g
.00~-C.1
2-). 1~0. 5
20. 5.~2, 0
Positive performance, g
15% of the average value
1 These refer to the shop afraid of not suitable for dyeing, people transport some color sub-chemical works: 2 The car square reaches the relevant use of the instrument print ten new, mature package modification, seek power to obtain the mineral and new added with the steam turbine oil: 3 According to the listed instrument is to use the manual flow of some actions before use and use the self-determined tube to determine the results may be the same, to look forward to the technical time. 14.2 Bias
This method has no bias, because the acid value can only be determined by this method. 15 Notice
Take two more results of the test and estimate as the test result, E
11 Specifications
A1. 1 External strength: red non-instrument service,
A1.2 Chemical properties: quantity less than 0
GB/T 49M5-2002
Appendix and
Standard Specifications of Para-enzyme A13: Rate of Newness: 10 Details Product Requirements 11. The full specification of the product is required, A.4 Crown small absorption elimination is determined.! UR sample is dissolved in = L of alcohol. Take this drop, dilute the sample to \m with a 1r thick absorption cell, water as the air liquid, and the minimum value of the specific release at the 650rm peak is 1.: A1-5 Range
A1. 51 When the indicator is tested before the incremental method is used, the indicator will rise and change to a completely different color at II=11+5.
A1.5.2 The indicator will begin to change to a completely different color at the position of (.0110./T). The potassium hydrogen cyanide standard liquid cannot pass through the blank test.
A1-5-3 The indicator is blue as shown in the U11m written in the hydrogen cyanide cabinet. The standard density coat can quickly pass through the blank test required by I.(rt..
Standard 1.5.4 The indicator liquid must be at least observed and changed to a high color. A1.5.5 The 5 ml of 0.5 mol/l sodium dihydrogen phosphate solution is diluted with 26.9 mol/l sodium violet oxide solution to obtain a pH value within the range of 1.1 mol/l. A2.1 Method for determining the pH value of a non-indicating instantaneous indicator is used to determine whether the color of the solution changes over different pH ranges. 12.2 Method
Hr is an artificial term used to indicate the relative activity of the aqueous medium in isocyanate-water. The range of application of this method is the standard Hr determined by measuring the pH value of the sample water sample at the time of the test. A2-4 Procedure
This method is used to establish the Hr corresponding to different chemical reactions. A2.5 instrument
monthly meter, glass electric rectifier, H from, stirrer, sintering rod, T operation (37324 method provisions in accordance with the test, A7.E reagents
Xu test the test points of pure water are the first-class water standard. 2.5: chemical material two barrier liquid (0.2ma1/! connection/T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of pressure benzene agent = ml. of technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Push buffer solution PH = 4.0>, according to S/7HC4 deep storage. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 flashes. A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6. 7. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument A2-B-1 Before each test or batch test, place the potential on the H grid and place the electrodes in a non-conductive medium. The potential is 25-2°C and the potential is adjusted when the H is changed. Adjust the potential of the instrument to make the potential readings correct. B.2 Remove the acid-generated residue, rinse the electrolyte with water, and rinse the electrolyte with alkali water. The temperature is 25-2℃ and the dripping liquid is rinsed. When the 1H electrometer reading is stable, record the correct value. If the reading value is between 11.0 and 11.2, the initial acidity of the solution can be obtained by consulting the potentiometer dial. If the selected value is not between 11.0 and 11.2, press A1 to convert the potentiometer to the initial acidity. In the water-sugar treatment wave, in the
, in the The calibration curve of the non-small stock is as follows: A2.9 Test frequency A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide solution until the value of the standard solution is between 13.14 and 14.2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrode, add 0.01 1. When the Hr displayed by the full potentiometer is between 13 and 1.1, record the corresponding pH value and the volume of U,0101/1.4 chloride and isopropanol standard solution when the color changes at different times: record the volume of the indicator solution consumed when the color changes to 1.01mnl/1.01mnl/1.2.9.4 Continue the titration in the same way as above. Record the volume of GR/T 4945/11/isopropyl hydroxide standard solution consumed when the color changes to the specified color. A2.10:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator chamber should be in accordance with the requirements of A1.-? and A1.5.3.Net concentration of standard hydrogenated propanol solution, mol/s - Sample size g:
KOH value, mgKOH/s
14 Specific molar difference
14.1 Precision
The results shall be determined according to the following provisions (95% confidence level, .5
14.1.1 Repeatability The difference between the results obtained by the same operator in the same experimental case using the same instrument for the same test shall not be greater than the following values.
Acid (strong) or base value, mgKOH/s
0. H~(. 1
G.1-~0. 3
*C, 5--1.0
1.0~-2- 0
E&.mgKOH/g
14.1.2 Reproducibility: The difference in individual results obtained by different simulations on the same sample at different temperatures shall not be less than ten times the stimulation value (strong acid value or oxidative value, mgKUI1/g
.00~-C.1
2-). 1~0. 5
20. 5.~2, 0
Positive performance, g
15% of the average value
1 These refer to the shop afraid of not suitable for dyeing, people transport some color sub-chemical works: 2 The car square reaches the relevant use of the instrument print ten new, mature package modification, seek power to obtain the mineral and new added with the steam turbine oil: 3 According to the listed instrument is to use the manual flow of some actions before use and use the self-determined tube to determine the results may be the same, to look forward to the technical time. 14.2 Bias
This method has no bias, because the acid value can only be determined by this method. 15 Notice
Take two more results of the test and estimate as the test result, E
11 Specifications
A1. 1 External strength: red non-instrument service,Www.bzxZ.net
A1.2 Chemical properties: quantity less than 0
GB/T 49M5-2002
Appendix and
Standard Specifications of Para-enzyme A13: Rate of Newness: 10 Details Product Requirements 11. The full specification of the product is required, A.4 Crown small absorption elimination is determined.! UR sample is dissolved in = L of alcohol. Take this drop, dilute the sample to \m with a 1r thick absorption cell, water as the air liquid, and the minimum value of the specific release at the 650rm peak is 1.: A1-5 Range
A1. 51 When the indicator is tested before the incremental method is used, the indicator will rise and change to a completely different color at II=11+5.
A1.5.2 The indicator will begin to change to a completely different color at the position of (.0110./T). The potassium hydrogen cyanide standard liquid cannot pass through the blank test.
A1-5-3 The indicator is blue as shown in the U11m written in the hydrogen cyanide cabinet. The standard density coat can quickly pass through the blank test required by I.(rt..
Standard 1.5.4 The indicator liquid must be at least observed and changed to a high color. A1.5.5 The 5 ml of 0.5 mol/l sodium dihydrogen phosphate solution is diluted with 26.9 mol/l sodium violet oxide solution to obtain a pH value within the range of 1.1 mol/l. A2.1 Method for determining the pH value of a non-indicating instantaneous indicator is used to determine whether the color of the solution changes over different pH ranges. 12.2 Method
Hr is an artificial term used to indicate the relative activity of the aqueous medium in isocyanate-water. The range of application of this method is the standard Hr determined by measuring the pH value of the sample water sample at the time of the test. A2-4 Procedure
This method is used to establish the Hr corresponding to different chemical reactions. A2.5 instrument
monthly meter, glass electric rectifier, H from, stirrer, sintering rod, T operation (37324 method provisions in accordance with the test, A7.E reagents
Xu test the test points of pure water are the first-class water standard. 2.5: chemical material two barrier liquid (0.2ma1/! connection/T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of pressure benzene agent = ml. of technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Push buffer solution PH = 4.0>, according to S/7HC4 deep storage. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 flashes. A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6. 7. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument A2-B-1 Before each test or batch test, place the potential on the H grid and place the electrodes in a non-conductive medium. The potential is 25-2°C and the potential is adjusted when the H is changed. Adjust the potential of the instrument to make the potential readings correct. B.2 Remove the acid-generated residue, rinse the electrolyte with water, and rinse the electrolyte with alkali water. The temperature is 25-2℃ and the dripping liquid is rinsed. When the 1H electrometer reading is stable, record the correct value. If the reading value is between 11.0 and 11.2, the initial acidity of the solution can be obtained by consulting the potentiometer dial. If the selected value is not between 11.0 and 11.2, press A1 to convert the potentiometer to the initial acidity. In the water-sugar treatment wave, in the
, in the The calibration curve of the non-small stock is as follows: A2.9 Test frequency A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide solution until the value of the standard solution is between 13.14 and 14.2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrode, add 0.01 1. When the Hr displayed by the full potentiometer is between 13 and 1.1, record the corresponding pH value and the volume of U,0101/1.4 chloride and isopropanol standard solution when the color changes at different times: record the volume of the indicator solution consumed when the color changes to 1.01mnl/1.01mnl/1.2.9.4 Continue the titration in the same way as above. Record the volume of GR/T 4945/11/isopropyl hydroxide standard solution consumed when the color changes to the specified color. A2.10:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator chamber should be in accordance with the requirements of A1.-? and A1.5.3.0~-2- 0
E&.mgKOH/g
14.1.2 Reproducibility: The difference in individual results obtained by different simulations on the same sample should not be less than ten times the stimulation value (strong acid value or oxidative value, mgKUI1/g
.00~-C.1
2-). 1~0. 5
20. 5.~2, 0
Positive, g
15% of the average value
1 These are the points that are not suitable for dyeing, coloring, and other works: 2 The relevant instruments are printed on the new ones, and the new ones are added with mineral additives: 3 The instruments listed are hand-made and the results of the flow determination are determined by the same method before use. 14.2 Bias
This method has no bias because the acid value can only be determined by this method. 15. Take the half of the two results as the test result, E11.1 Specifications: A1.1 External strength: Red non-instrumental technology, A1.2 Chemical properties: The quantity is less than 0. GB/T 49M5-2002 Appendix and the specifications of the standard for para-enzyme benzene A13: Rate of newness: 10 years. The product needs to meet the requirements of the merchant. A.4 Crown small absorption consumption is determined. ! The sample of UR is dissolved in = L of alcohol. Take this drop of micro-liquid, dilute the sample to the intermediate liquid of [1/3], use other types of spectrometer, 1/4 thick absorption cell, water as blank liquid, the minimum value of the specific release at the 650rm peak is 1.: A1-5 Specification
A1.51 When the indicator is tested before the indicator is 1/2, the indicator will change to a completely different color at 11+5,
A1.5.2 The indicator will not change to a completely different color at the lower limit of (.0110./T). The potassium cyanide standard liquid cannot pass the blank test.
A1-5-3 The blue indicator U11m in the hydrogen cyanide cabinet can quickly pass the blank test required by the standard density coat. (rt..
Standard 1.5.4 The indicator liquid must be observed and changed to at least - price. A1. 5.5 After flushing, the 5 ml of 0.5 ol/1.0 dihydrogen sulphate was concentrated to 26.9 m]. mol/mol, of caustic soda solution.
A? Method for determining pHr range for combined indicator A2.1 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.2 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.3 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.4 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.5 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.6 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.7 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.8 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.9 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.10 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.11 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.13 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.14 Standard use of | The H of the raw water is unknown at the time of the test, and the well date is also determined by the method. A2-4 paragraphs and the history
This method is used to establish the Hr corresponding to the different hazardous chemicals of Caibenzene. A2.5 instrument
month meter, glass electric rectifier, H comes from, stirrer, sintering rod T operation (37324 method in accordance with the provisions of the method, A7.E reagents
Xu test the pure water in the test are all the first-class water standard 2. 2.5: chemical material two barrier liquid (0.2ma1/! connection / T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of benzene pressure agent = ml. The technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Buffer solution pH = 4.0>, prepare according to S/7HC4. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 minutes, A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6.7 Prepare the benzene indicator solution as described in 8.1-, A2. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument
A2-B-1 Before each test or each batch of tests, set the potential to the H grid and place the electrodes in a solution containing non-technical ... When the 1H electrometer reading is stable, record the correct value. If the reading is between 11.0 and 11.2, the initial acidity of the liquid can be obtained by consulting the value on the potentiometer dial. If the selected value is not between 11.1 and 12, press A1 to convert the potentiometer into the initial acidity. In the case of a
in the water-sugar treatment wave, the effective value is
0134. 56789101112
Figure A[Convert the reading to the calibration curve of 1:1 IrA2.9 Test frequency
A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide until the value indicated is between 13.5 and 14.5 μl. Record the volume of 1:1 potassium hydroxide tablet standard solution consumed per 1:1 Ir. 2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrodes, add 0.01 ma./, potassium oxide isopropyl alcohol standard solution. When the Hr indicated by the full potentiometer is between 13-1, record the corresponding pH value and the volume of U,01o1/. chlorine and isopropyl alcohol standard solution 42.9.3 During the titration process, use the titration volume to measure the Hr or potentiometer. And mark the corresponding Hr value on the curve. Record the color change of the indicator droplet at different times: record the color change of the indicator droplet at different times: The volume of potassium iodide consumed during the titration is 1.01mnl/ ... 4945
.ao1/the volume of isopropanol standard solution is calculated by A2.10
East[1=:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator box is the volume of potassium hydroxide standard solution consumed by the titration in the air. The volume consumed by the titration in the air must be in accordance with the specifications of A1.-? and A1.5.3.0~-2- 0
E&.mgKOH/g
14.1.2 Reproducibility: The difference in individual results obtained by different simulations on the same sample should not be less than ten times the stimulation value (strong acid value or oxidative value, mgKUI1/g
.00~-C.1
2-). 1~0. 5
20. 5.~2, 0
Positive, g
15% of the average value
1 These are the points that are not suitable for dyeing, coloring, and other works: 2 The relevant instruments are printed on the new ones, and the new ones are added with mineral additives: 3 The instruments listed are hand-made and the results of the flow determination are determined by the same method before use. 14.2 Bias
This method has no bias because the acid value can only be determined by this method. 15. Take the half of the two results as the test result, E11.1 Specifications: A1.1 External strength: Red non-instrumental technology, A1.2 Chemical properties: The quantity is less than 0. GB/T 49M5-2002 Appendix and the specifications of the standard for para-enzyme benzene A13: Rate of newness: 10 years. The product needs to meet the requirements of the merchant. A.4 Crown small absorption consumption is determined. ! The sample of UR is dissolved in = L of alcohol. Take this drop of micro-liquid, dilute the sample to the intermediate liquid of [1/3], use other types of spectrometer, 1/4 thick absorption cell, water as blank liquid, the minimum value of the specific release at the 650rm peak is 1.: A1-5 Specification
A1.51 When the indicator is tested before the indicator is 1/2, the indicator will change to a completely different color at 11+5,
A1.5.2 The indicator will not change to a completely different color at the lower limit of (.0110./T). The potassium cyanide standard liquid cannot pass the blank test.
A1-5-3 The blue indicator U11m in the hydrogen cyanide cabinet can quickly pass the blank test required by the standard density coat. (rt..
Standard 1.5.4 The indicator liquid must be observed and changed to at least - price. A1. 5.5 After flushing, the 5 ml of 0.5 ol/1.0 dihydrogen sulphate was concentrated to 26.9 m]. mol/mol, of caustic soda solution.
A? Method for determining pHr range for combined indicator A2.1 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.2 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.3 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.4 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.5 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.6 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.7 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.8 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.9 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.10 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.11 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.13 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.14 Standard use of | The H of the raw water is unknown at the time of the test, and the well date is also determined by the method. A2-4 paragraphs and the history
This method is used to establish the Hr corresponding to the different hazardous chemicals of Caibenzene. A2.5 instrument
month meter, glass electric rectifier, H comes from, stirrer, sintering rod T operation (37324 method in accordance with the provisions of the method, A7.E reagents
Xu test the pure water in the test are all the first-class water standard 2. 2.5: chemical material two barrier liquid (0.2ma1/! connection / T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of benzene pressure agent = ml. The technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Buffer solution pH = 4.0>, prepare according to S/7HC4. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 minutes, A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6.7 Prepare the benzene indicator solution as described in 8.1-, A2. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument
A2-B-1 Before each test or each batch of tests, set the potential to the H grid and place the electrodes in a solution containing non-technical ... When the 1H electrometer reading is stable, record the correct value. If the reading is between 11.0 and 11.2, the initial acidity of the liquid can be obtained by consulting the value on the potentiometer dial. If the selected value is not between 11.1 and 12, press A1 to convert the potentiometer into the initial acidity. In the case of a
in the water-sugar treatment wave, the effective value is
0134. 56789101112
Figure A[Convert the reading to the calibration curve of 1:1 IrA2.9 Test frequency
A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide until the value indicated is between 13.5 and 14.5 μl. Record the volume of 1:1 potassium hydroxide tablet standard solution consumed per 1:1 Ir. 2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrodes, add 0.01 ma./, potassium oxide isopropyl alcohol standard solution. When the Hr indicated by the full potentiometer is between 13-1, record the corresponding pH value and the volume of U,01o1/. chlorine and isopropyl alcohol standard solution 42.9.3 During the titration process, use the titration volume to measure the Hr or potentiometer. And mark the corresponding Hr value on the curve. Record the color change of the indicator droplet at different times: record the color change of the indicator droplet at different times: The volume of potassium iodide consumed during the titration is 1.01mnl/ ... 4945
.ao1/the volume of isopropanol standard solution is calculated by A2.10
East[1=:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator box is the volume of potassium hydroxide standard solution consumed by the titration in the air. The volume consumed by the titration in the air must be in accordance with the specifications of A1.-? and A1.5.3.2 Chemical properties: The quantity is less than 0.001% of the specifications of GB/T 49M5-2002 Appendix and the standard A13: Newness: 10% of the product needs to meet the requirements of the manufacturer, A.4 small absorption and consumption are determined. UR is dissolved in 1L of bovine alcohol. Take this drop of micro-liquid, dilute the sample to the intermediate liquid of [1/3], use other types of spectrometer, 1/4 thick absorption cell, water as blank liquid, the minimum value of the specific release at the 650rm peak is 1.: A1-5 Specification
A1.51 When the indicator is tested before the indicator is 1/2, the indicator will change to a completely different color at 11+5,
A1.5.2 The indicator will not change to a completely different color at the lower limit (.0110./T). The potassium cyanide standard liquid cannot pass the blank test.
A1-5-3 The blue indicator U11m in the hydrogen cyanide cabinet can quickly pass the blank test required I. (rt..
Standard 1.5.4 The indicator liquid must be observed and changed to at least - price. A1. 5.5 After flushing, the 5 ml of 0.5 ol/1.0 dihydrogen sulphate was concentrated to 26.9 m]. mol/mol, of caustic soda solution.
A? Method for determining pHr range for combined indicator A2.1 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.2 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.3 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.4 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.5 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.6 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.7 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.8 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.9 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.10 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.11 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.13 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.14 Standard use of | The H of the raw water is unknown at the time of the test, and the well date is also determined by the method. A2-4 paragraphs and the history
This method is used to establish the Hr corresponding to the different hazardous chemicals of Caibenzene. A2.5 instrument
month meter, glass electric rectifier, H comes from, stirrer, sintering rod T operation (37324 method in accordance with the provisions of the method, A7.E reagents
Xu test the pure water in the test are all the first-class water standard 2. 2.5: chemical material two barrier liquid (0.2ma1/! connection / T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of benzene pressure agent = ml. The technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Buffer solution pH = 4.0>, prepare according to S/7HC4. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 minutes, A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6.7 Prepare the benzene indicator solution as described in 8.1-, A2. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument
A2-B-1 Before each test or each batch of tests, set the potential to the H grid and place the electrodes in a solution containing non-technical ... When the 1H electrometer reading is stable, record the correct value. If the reading is between 11.0 and 11.2, the initial acidity of the liquid can be obtained by consulting the value on the potentiometer dial. If the selected value is not between 11.1 and 12, press A1 to convert the potentiometer into the initial acidity. In the case of a
in the water-sugar treatment wave, the effective value is
0134. 56789101112
Figure A[Convert the reading to the calibration curve of 1:1 IrA2.9 Test frequency
A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide until the value indicated is between 13.5 and 14.5 μl. Record the volume of 1:1 potassium hydroxide tablet standard solution consumed per 1:1 Ir. 2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrodes, add 0.01 ma./, potassium oxide isopropyl alcohol standard solution. When the Hr indicated by the full potentiometer is between 13-1, record the corresponding pH value and the volume of U,01o1/. chlorine and isopropyl alcohol standard solution 42.9.3 During the titration process, use the titration volume to measure the Hr or potentiometer. And mark the corresponding Hr value on the curve. Record the color change of the indicator droplet at different times: record the color change of the indicator droplet at different times: The volume of potassium iodide consumed during the titration is 1.01mnl/ ... 4945
.ao1/the volume of isopropanol standard solution is calculated by A2.10
East[1=:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator box is the volume of potassium hydroxide standard solution consumed by the titration in the air. The volume consumed by the titration in the air must be in accordance with the specifications of A1.-? and A1.5.3.2 Chemical properties: The quantity is less than 0.001% of the specifications of GB/T 49M5-2002 Appendix and the standard A13: Newness: 10% of the product needs to meet the requirements of the manufacturer, A.4 small absorption and consumption are determined. UR is dissolved in 1L of bovine alcohol. Take this drop of micro-liquid, dilute the sample to the intermediate liquid of [1/3], use other types of spectrometer, 1/4 thick absorption cell, water as blank liquid, the minimum value of the specific release at the 650rm peak is 1.: A1-5 Specification
A1.51 When the indicator is tested before the indicator is 1/2, the indicator will change to a completely different color at 11+5,
A1.5.2 The indicator will not change to a completely different color at the lower limit of (.0110./T). The potassium cyanide standard liquid cannot pass the blank test.
A1-5-3 The blue indicator U11m in the hydrogen cyanide cabinet can quickly pass the blank test required by the standard density coat. (rt..
Standard 1.5.4 The indicator liquid must be observed and changed to at least - price. A1. 5.5 After flushing, the 5 ml of 0.5 ol/1.0 dihydrogen sulphate was concentrated to 26.9 m]. mol/mol, of caustic soda solution.
A? Method for determining pHr range for combined indicator A2.1 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.2 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.3 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.4 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.5 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.6 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.7 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.8 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.9 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.10 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.11 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.13 Standard use of
Hr is used to determine whether the color change of the non-indicator is acceptable within different H ranges. 12.14 Standard use of | The H of the raw water is unknown at the time of the test, and the well date is also determined by the method. A2-4 paragraphs and the history
This method is used to establish the Hr corresponding to the different hazardous chemicals of Caibenzene. A2.5 instrument
month meter, glass electric rectifier, H comes from, stirrer, sintering rod T operation (37324 method in accordance with the provisions of the method, A7.E reagents
Xu test the pure water in the test are all the first-class water standard 2. 2.5: chemical material two barrier liquid (0.2ma1/! connection / T733 preparation, pick cabinet standard wide drop liquid. A2.6.2 total alcohol Le Ya deep amount 3./technical 73 preparation and Le fixed rate liquid. A2.6.3 disease end drop agent: 00mL of benzene pressure agent = ml. The technique I person 4ml. of isotropic alcohol GR/T 4945—2002
A2.6.4 Buffer solution pH = 4.0>, prepare according to S/7HC4. 1L of buffer solution has 1) ml of drop solvent added. The release concentration is used in 5 minutes, A2.6.5 Reduced buffer solution (H-11. (): pad (1/T78C4 Jiankan Sui Chongnuo storage. Add 10 ml of buffer solution to 10 ml of drop solvent. The solution is used in: h state, 42.66 Chloride solution: prepare a saturated potassium chloride aqueous solution. 42.6.7 Prepare the benzene indicator solution as described in 8.1-, A2. Prepare the electrode system as described in GB/T+304. 2.8 Calibration of the instrument
A2-B-1 Before each test or each batch of tests, set the potential to the H grid and place the electrodes in a solution containing non-technical ... When the 1H electrometer reading is stable, record the correct value. If the reading is between 11.0 and 11.2, the initial acidity of the liquid can be obtained by consulting the value on the potentiometer dial. If the selected value is not between 11.1 and 12, press A1 to convert the potentiometer into the initial acidity. In the case of a
in the water-sugar treatment wave, the effective value is
0134. 56789101112
Figure A[Convert the reading to the calibration curve of 1:1 IrA2.9 Test frequency
A2.9.1 Titrate 1 ml of the standard solution with 0.5 ml of hydrogen peroxide until the value indicated is between 13.5 and 14.5 μl. Record the volume of 1:1 potassium hydroxide tablet standard solution consumed per 1:1 Ir. 2.9.2 Add 0.5 ml of the standard solution to another newly titrated solution. After cleaning the electrodes, add 0.01 ma./, potassium oxide isopropyl alcohol standard solution. When the Hr indicated by the full potentiometer is between 13-1, record the corresponding pH value and the volume of U,01o1/. chlorine and isopropyl alcohol standard solution 42.9.3 During the titration process, use the titration volume to measure the Hr or potentiometer. And mark the corresponding Hr value on the curve. Record the color change of the indicator droplet at different times: record the color change of the indicator droplet at different times: The volume of potassium iodide consumed during the titration is 1.01mnl/ ... 4945
.ao1/the volume of isopropanol standard solution is calculated by A2.10
East[1=:02. At the pH value corresponding to the relative color change, the volume consumed by the titration indicator box is the volume of potassium hydroxide standard solution consumed by the titration in the air. The volume consumed by the titration in the air must be in accordance with the specifications of A1.-? and A1.5.3.A2.6.4 Push buffer solution PH = 4.0>,
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