GB/T 8088-1999 Determination of nitrogen content of natural rubber and natural rubber latex
Some standard content:
GB/T80B8-1999 is equivalent to ISO 1656:2995 determination of the content of natural rubber latex and natural rubber latex. This standard is basically consistent with the technical content of ISO 1656-999 except for the description of the main grinding and the details of the precision in ISO 1656-1996. The main difference is that the standard GB/T80B8-1999 is equivalent to ISO 1656:2995 determination of the content of natural rubber latex and natural rubber latex. This standard is equivalent to ISO 1656-999 except for the description of the main grinding and the details of the precision in ISO 1656-1996. This standard is basically consistent with GB/T80B8-1987. The main difference is that the standard GB/T80B8-1999 is equivalent to ISO 1656:2999 determination of the content of natural rubber latex and natural rubber latex. The technical requirements of the semi-reliable nitrogen digestion and heat shrinkage device are specified in the standard GB/T80B8-1999:2999; the digestion method using red envelope oxidation as catalyst: the disc method and the slow recovery method using acid as catalyst are specified. The closed rate A is indicated. This standard is proposed by the Ministry of Agriculture of the People's Republic of China. This standard is sponsored by the State Administration of Industry and Information Technology. Rubber and rubber products standardization technical committee, aerospace braid rubber shares technical committee. This standard is issued by: South tropical clothing production research institute. This standard is issued by the above-mentioned persons, Deng Feng, Qu Ma, Ying Zheng, this standard is entrusted to the National Association of Rubber and Rubber Products Standardization Technical Committee, ... ISO is a worldwide cooperative organization composed of international organizations (ISO or member organizations). The work of preparing International Standards is usually carried out by ISO technical committees. Any member interested in a technical issue has the right to join the committee. International governmental and non-governmental organizations in liaison with ISO may participate in this work: On all aspects of electrotechnical standardization, ISO collaborates with the International Electrotechnical Commission (IEC) to accumulate draft International Standards adopted by the technical committees, publish them under the supervision of member organizations, and when they are published as International Standards, they require 75% of the registered votes or member registration fees. International Standards Standard ISO J656 was developed by the Technical Committee of ISC/TC.45 on Rubber and Light Products. The second edition of this standard has made technical revisions to the first edition (IS) 16G6: 1988), canceling and replacing the second edition. Appendix A of this international standard is an additional appendix. National Standard of the People's Republic of China on Natural Raw Rubber and Natural Rubber Latex Determination of Nitrogen Content Rubber.raw nuturnl aad rubber latex,zaturalDetermination of itrugea cuntentGB/T80881999
eq1801656.1996
Generation group GB/T 8C-551S57
World reputation: Personnel using this standard should be familiar with the operating procedures of regular laboratories. This standard does not involve all safety issues that may arise from the use of this standard. It is the responsibility of the user to formulate corresponding safety and health systems and ensure compliance with relevant national laws and regulations. Scope
This standard specifies the determination of nitrogen content in non-flammable raw rubber and natural latex by the modified nitrogen determination method, the constant method and the semi-micro method. This standard is applicable to the determination of nitrogen content in raw rubber and natural latex, and is used to determine the basic content of natural rubber in order to make an estimate of the rubber content. In order to estimate the content of natural rubber, there are a small amount of non-natural rubber in the rubber. These materials are mainly present in the total content of solids obtained by mixing with the rubber. 2 Reference standards
The following standards contain provisions and texts, which shall be included in this standard and constitute the provisions of this standard. At the time of this standard, the versions shown are valid. All standards will be revised. The parties with the following standards should explore the possibility of using the latest versions of the following standards: GB/82-18? Sampling of natural latex (S0123:1335) GH8298-1587 Determination of total solid content of natural latex (NE[S124:1985) GB/T15340:1994: Sampling and preparation of natural and synthetic latex (S0/1R9272.1986 Determination of standard precision of test force method for stable cavity and rubber products 3 Principle
Chemically combine the known mass of the rod, dead section and the chemical agent composed of the first and second acid and smoke or acid rain. In the treatment column, the nitrogen compound is converted into hydrogen sulfate. Add alkali to make the digestion liquid alkaline, and the chlorine is evaporated after heating. The effect of the potential release can be absorbed by the following two methods: absorb with standard tantalum solution, then titrate with standard tantalum solution. The excess aldehyde is absorbed with triturated acid solution, then titrate with standard tantalum solution. (Acid is a weak alkali metal, it will not be used as an internal indicator in ketone titration.) 4. Demand method 4.1 Reagents Unless otherwise specified, only reagents of confirmed analytical origin and with equivalent purity can be used in the analysis. 4.11 Chemical mixture or standardized chemical solution Approved by the State Administration of Quality and Technical Supervision on August 11, 1999 Industry: 2000-02 -01 Practice
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GB/T8088-1999
: When the bacteria react quickly, the person's gas as well as the skin and clothes should be exposed to the air. The operation should be carried out in well-ventilated conditions. 4.1.1.1 Catalyst compound
Prepare a fine and uniform catalyst compound composed of the following substances: 3 parts by weight of ethyl sulphuric acid (K.SO,), 4 parts by weight of sulfuric acid pentahydrate (CuSO, M,) and 1 part by weight of 4.1.1.2 Chemical solution: Heat 110g of anhydrous sodium sulfate, 14.7g of isocyanate pentahydrate and 3.7g of alcohol powder or 7.49g of sodium thiocarbaldehyde to dissolve in 600mL of sodium thiocarbaldehyde (4.1.2). 4.1.2 Thialdehyde: density p=1.84g/mL: 4.1.3 Dead load standard solution: concentration cHS0,=0U5mol. 4.1.4 Caustic soda (NO3) (denoted as sodium hydroxide) 1ml/mL. 4.1.5 Oxidation of oxygen: Prepare by weighing 40 n N solid sodium hydride and dropping it into tCUm
4.1.6 Use a microplate to drop it, the concentration is c(H2O) (.17m01/L), the preparation method is to weigh 10 g of the solid acid and add it into 11.5 mL of water, heat if necessary, and then let the solution cool to room temperature. 4.77 Mixed indicator solution: weigh 1.05 g of 1.1% acetyl alcohol and drop it into 100 mL of 96% v/v ethanol. This indicator solution may deteriorate during storage or over-accumulation and should be prepared before use. 4.7 Equipment: The equipment should be equipped with a full-scale instrument with a capacity of 8UJ, and the amount of chemical reaction should be determined only. 4.3 Sampling and sample preparation: When determining the nitrogen content of raw rubber, collect samples according to the method specified in R/T15340 to prepare homogenized test pieces, and then homogenize the test pieces! Commercial rubber: When determining the nitrogen content of rubber, take a representative full-scale mixed latex sample (containing 2% of the total volume) from the sample specified in GB/T82SC, and then dry it according to the method specified in CB/T8298. 4.4 Procedure
4.4.1 Take about 78 ml of latex from cotton gum, extract until 0.5 mg, cut into small pieces and place in a digestion filter flask (4.2). Add about 13 g of the activator mixture (4.1.1.1) and 1 mL of ethyl ether (1.1.2) - you can also add 65 ml of the catalyst solution (4.1.1.2): stir the contents by stirring, then slowly heat until the liquid becomes clear, continue to stir for 1 hour, let the digestion flask and its contents cool to room temperature, carefully add 200 ml of water, and stir to mix. Put the collected bottle with the absorption error in place, and then connect the steam and retaining device. After the full bucket is filled, add 15% hematoxylin and iodine (1.1.5) to the digestion flask.
4.4.2 Follow the procedures of 4.4.2.1 or 1.4.2.2 to absorb and determine the released nitrogen. The temperature of the collection bottle should be kept below 30% to prevent short-term loss.
4.4.2.1 Use a pipette to draw 75mL of water and 25ml of standard sample (4.13) into the collection bottle of the query device, and add 2 drops of the indicator solution (4.1.7) Place the collecting flask so that the end of the cooling tube can be immersed in the absorbent liquid surface, press the bottle seal of the flask with your hand, rotate it to make the contents fully absorbed, and immediately start evaporation. Continue to collect at a certain rate until 2 CCmL of radium is absorbed. If the color of the indicator changes, indicating that the absorption is too little, stop the measurement and quickly repeat the test with more alkali or less sample. Evaporation is complete. After that (the volume of the receiving bottle reaches about 3ccm1). Use sodium hydroxide solution (4.1.4) to titrate the contents of the receiving bottle: take the burette reading, and add 0.02ml4.4.2.21ccm1 of gelatin solution (4.1.5) into the receiving container of the honey distillation device, and then add 2 full of mixed indicator solution (4.1.7). 40 bodies of good fighting fell into 1L of water, and the standard medical treatment did not. Tiwei
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GB/T8088-1999
According to the dyeing operation described in 4.4.2.1, the box is obtained, and the plaque acid (4.1.9) is filtered 4.5 Blank test
While measuring the sample, change the same number of test ends and the same test conditions, but do not use the sample to perform a blank test. 4.6 Expression of results:
4.6.1 When the acid used as the absorbent in 1.1.2.2 is used, the content of the probe (expressed as a percentage of mass disk) is calculated according to formula (1), the micro-complex - 0.14 (VL- V,)
Wherein, V,—volume of sodium hydroxide standard titration solution (4.1.4) required for titration, mI; V.—volume of sodium hydroxide standard titration solution (4.1.4) required for blank test titration, L: mass of sample·g.
The analysis result should be accurate to 0.1 times
4.6.2 When acid adjustment is used as the collecting solution according to 4.4.2.3, the nitrogen content of the sample (expressed as mass percentage) shall be calculated according to formula 2) G.14(V-Vt)
Chlorine content:
Wherein, volume of acid standard titration solution (4.1.3) required for full titration, mI; V,—volume of sodium hydroxide standard titration solution (4.1.3) required for full titration in blank test + mI.mass of sample·g.
The analysis result should be accurate to, L_%.
Disperse
5.1 Reagents
Unless otherwise specified, reagents of recognized analytical grade or higher may be used in the separation, and water or water of appropriate purity may be used.
5.1.1 Low temperature and humidity
When using alcohol, avoid damaging the skin and hair. The alcohol should be handled under suitable conditions.
Prepare a finely dispersed mixture of the following materials: 39 parts by weight of anhydrous potassium carbonate (K, 50.5), 1 part by weight of copper carbonate pentahydrate (CuSO.·5H.O), and 1 part by weight of sodium sulfate or 2 parts by weight of sodium sesquioxane decahydrate (Na,Se), 10[,]). 5.1.2 Use: concentration: 1.4/L.
5. Standardization of Vitamin B60a
5.1.4 Hydrogenation solution: sodium hydroxide (NH4OH) 10 mol/L. Preparation method: weigh 400 g of sodium hydroxide solution and add it to 6 mL of water.
5.1.5 Standardization of sodium hydroxide solution: sodium hydroxide (NaDH) 42.02 mL/L, no carbonate. 5.1.6 Magnetic reduction: concentration sodium hydroxide (NH4OH) 0.17 mol/L. Preparation method: collect 10 g of sodium hydroxide solution and add it to 1 mL of water. Heat the solution and allow it to cool to room temperature. Prepare a 5.17% MgSO4 solution: 6. Methyl cyanide and methylene blue in 99 mL of ethanol. This reagent may be volatile during storage and should be prepared as needed. 5.2 Instruments: The following instruments and instruments are used. 5.2.1 Semi-solidified instruments: Micro-digestion instrument: equipped with a digestion incubator with a capacity of 3 mL (see Figure 1, Figure 3). If you are not sure about the specific conditions of the child, please consult the doctor. Follow the instructions for use.
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GE/T 8088—1999
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GH/T8088-1999
5.2.2 Semi-volume Kjeldahl evaporation air: equipped with silver, glass-glass cold aldehyde camp (see Figure 1 Figure 9. 5.2.3 Semi-microplate agreed belt: wear volume = mL or 10mL graduation is 0.02mL gift
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5.3 Sampling preliminary test teaching preparation
GR/T 80BB—1999
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Western China is the most standard instrument for the market
When determining the nitrogen content of latex, a sampling and preparation homogenization test piece made in GB/15340 should be installed, and then the sample is taken from the homogenization test piece, standard technology network W practical standard industry information free download
GB/T 088—1999
When determining the nitrogen content of latex, a representative funnel test piece (containing 0.1S total solid) should be prepared according to the method specified in GB32, and it should be refined to the weight specified by GB/T2 standard. 5.4 Operating Procedure 5.4.1 Take 1 g to 2 g (up to 1 mg) of the gel or dried latex sample and place it in a digestion flask (5.2.1). Add 55 g of the oxidizing agent (5.1.11) and 3.0 mL of the ethanol (5.1.3). Heat the contents carefully to boiling point. When the digestion solution becomes a thick greenish color with a yellowish tint, continue boiling for 3 min. Over-digestion will cause it to solidify quickly when cooled. This should be avoided as it will result in severe damage. Bring the water in the evaporator to a boil and place the evaporator in a container (5.2.2> Steaming time: at least 2m15, when steam is used to purge, the water in the cooling jacket should be emptied: at the same time, let the digestion flask cool to room temperature, and then add 1) 1) water to the digestion flask. When the purge process is completed, the digestion liquid should be steamed immediately. In order to completely steam the digestion liquid, the digestion flask should be washed 3 times, each time with 1) ... 5.4-2.1 Add the known sulfuric acid solution (-2.3) to 51m1 of 5.1.3 according to the estimated content of the sample into the selected bottle, and add 2 drops of water according to the indicator (5.1.7) about 5m. The height of the collecting plate makes the cooling device diffuse into the sulfuric acid liquid below the surface, and it is best to make the environment pass through the bottle to the ground to determine the bacteria content.
Use the most recommended 15ml sodium monohydrate solution (5.1.4) to add into the heat energy, and pass the steam generated from the steam generator into the hot bottle 10m5~12m, in this room, to receive the liquid with an estimated value of about 71. If the color of the indicator changes, it means that the absorption wave has become positive, and the measurement is stopped. Use a larger amount of acid or a smaller amount of sample to repeat the test. After the evaporation is complete, lower the receiving bottle so that the lower end of the condensate is above the acid solution. Adjust the level for 1 minute, then wash the condensate with a few drops of evaporating water and collect it in the receiving bottle. Determine the concentration of the solution in the receiving plate with the solution (5.1, 5), read the titration tape, and grind to 0.02mL. 5.4-2.2 Place about 10ml of the acid solution (6.1.6) in the rinsed receiving bottle, add 3 drops of the indicator solution (5.1.7), and perform the operation described in 54.2.1. However, it should be noted that when the solution is present, the color of the indicator solution should change as soon as it starts to emit light. Use the value chain (E..3) to determine the concentration of the solution, and take the measuring tube. Accurate to 0.G2mL. 5.5 Blank H test
While carrying out the determination, a blank test shall be carried out with the same amount of reagents and under the same test conditions, but with different test materials. 5.E Presentation of results
5.6-1 When the method specified in 5.4, 2.1 is used for absorption and filtration, the nitrogen content shall be expressed in mass percentage and calculated by formula (3). D.2iV, V
. The required sodium hydroxide standard titration solution (5..5) for titration is mL; Y
The required amount of true oxidizing agent (5.1.5) for blank test titration is m]. 1m test pan.
The separation result shall be accurate to 9.01%.
5.6-2 When the method specified in 5.1.2.2 is used to absorb the liquid, the content of colloid shall be expressed as a percentage of mass and calculated according to formula (4:
0.28 (V:-)
Wherein: Va——the volume of standard sulfuric acid required for titration [5.1.5>, L1) If the standard titration solution is not completely determined by the doctor, the test results shall be used appropriately. Tivi
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GB/T 8088--1999
V,---The volume of standard sulfuric acid drop (5,1.5) required for blank test.mI.:---The quality of the sample, name.
Analysis results should be within (.%.
6 Precision
The precision and reproducibility of the test samples were calculated by RS272 and the results of the type 1 precision test for the averaged samples and the averaged samples are listed in Tables 1 and 2 respectively. The use of the guidance is shown in Appendix A (Recommended Record).
General rubber products
Combined rising
Pingluoke content
Total (m/ni?
Juice: Repeatability = Relative percentage
1 Type 1 homogenized product test
Repeatability () = Mean value relative percentage efficiency: Reproducibility, quality self-efficiency
(R=Reproducibility, relative percentage, Table 2
Peak value
Appropriate value
Balance and quality
Note: 7- Maximum precision
Precision
Un-homogenized sample test
(-)- Reproducibility, relative percentage, R=Reproducibility quality percentage:
() 2. Reproducibility, average other state percentage, test report
The test report shall include the following contents:
c) Abbreviation and use method of this standard; b) Details of product marking:
d) Method used to indicate analytical results! ) Test record for new test materials:
) Note on the following during the test: 5. 53
Reproducibility between experiments
Reproducibility that can be verified
Any operation not included in this standard or the standards referenced in this standard, as well as any operation that is considered optional; multiple) test date,
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GB/T8088-1999
Appendix A
(Suggestive judgment appendix)
Guide to the quick use of precision results
A The general order of the quick use of precision results is as follows: Symbol 1: T2 represents the absolute difference between two measured values at any point (that is, do not forget positive or negative.
A2 At the position closest to the average of the ten test data means (measurement parameters), check the corresponding material density table (of any test parameter). This line is to use the corresponding (r), R, and R) judgment process. A3 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A3.1 For a pair of pairs, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A3.2 For the difference between the means of two tests, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A4 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A4.1 The absolute difference between the two independent test means of the same material measured by two laboratories using normal and correct net explosion test procedures is 1:1, (consistent)/2×10. The absolute difference between the two independent test means of the same material measured by two independent test ...2 Place about 10 ml of the acid solution (6.1.6) in the purged receiving bottle, add 3 full of the indicator solution (5.1.7) and fumigate according to the operation described in 54.2.1. However, it should be noted that when exhaust gas is present, the color of the indicator solution should change as soon as it starts to emit. Use the value chain (E..3) to fill up the solution and set the measuring tube to 0.G2mL. 5.5 Blank H test
While carrying out the determination, a blank test shall be carried out with the same amount of reagents and under the same test conditions, but with different test materials. 5.E Presentation of results
5.6-1 When the method specified in 5.4, 2.1 is used for absorption and filtration, the nitrogen content shall be expressed in mass percentage and calculated by formula (3). D.2iV, V
. The required sodium hydroxide standard titration solution (5..5) for titration is mL; Y
The required amount of true oxidizing agent (5.1.5) for blank test titration is m]. 1m test pan.
The separation result shall be accurate to 9.01%.
5.6-2 When the method specified in 5.1.2.2 is used to absorb the liquid, the content of colloid shall be expressed as a percentage of mass and calculated according to formula (4:
0.28 (V:-)
Wherein: Va——the volume of standard sulfuric acid required for titration [5.1.5>, L1) If the standard titration solution is not completely determined by the doctor, the test results shall be used appropriately. Tivi
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GB/T 8088--1999
V,---The volume of standard sulfuric acid drop (5,1.5) required for blank test.mI.:---The quality of the sample, name.
Analysis results should be within (.%.
6 Precision
The precision and reproducibility of the test samples were calculated by RS272 and the results of the type 1 precision test for the averaged samples and the averaged samples are listed in Tables 1 and 2 respectively. The use of the guidance is shown in Appendix A (Recommended Record).
General rubber products
Combined rising
Pingluoke content
Total (m/ni?
Juice: Repeatability = Relative percentage
1 Type 1 homogenized product test
Repeatability () = Mean value relative percentage efficiency: Reproducibility, quality self-efficiency
(R=Reproducibility, relative percentage, Table 2
Peak value
Appropriate value
Balance and quality
Note: 7- Maximum precision
Precision
Un-homogenized sample test
(-)- Reproducibility, relative percentage, R=Reproducibility quality percentage:
() 2. Reproducibility, average other state percentage, test report
The test report shall include the following contents:
c) Abbreviation and use method of this standard; b) Details of product marking:
d) Method used to indicate analytical results! ) Test record for new test materials:
) Note on the following during the test: 5. 53
Reproducibility between experiments
Reproducibility that can be verified
Any operation not included in this standard or the standards referenced in this standard, as well as any operation that is considered optional; multiple) test date,
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GB/T8088-1999
Appendix A
(Suggestive judgment appendix)
Guide to the quick use of precision results
A The general order of the quick use of precision results is as follows: Symbol 1: T2 represents the absolute difference between two measured values at any point (that is, do not forget positive or negative.
A2 At the position closest to the average of the ten test data means (measurement parameters), check the corresponding material density table (of any test parameter). This line is to use the corresponding (r), R, and R) judgment process. A3 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A3.1 For a pair of pairs, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A3.2 For the difference between the means of two tests, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A4 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A4.1 The absolute difference between the two independent test means of the same material measured by two laboratories using normal and correct net explosion test procedures is 1:1, (consistent)/2×10. The absolute difference between the two independent test means of the same material measured by two independent test ...2 Place about 10 ml of the acid solution (6.1.6) in the purged receiving bottle, add 3 full of the indicator solution (5.1.7) and fumigate according to the operation described in 54.2.1. However, it should be noted that when exhaust gas is present, the color of the indicator solution should change as soon as it starts to emit. Use the value chain (E..3) to fill up the solution and set the measuring tube to 0.G2mL. 5.5 Blank H test
While carrying out the determination, a blank test shall be carried out with the same amount of reagents and under the same test conditions, but with different test materials. 5.E Presentation of results
5.6-1 When the method specified in 5.4, 2.1 is used for absorption and filtration, the nitrogen content shall be expressed in mass percentage and calculated by formula (3). D.2iV, V
. The required sodium hydroxide standard titration solution (5..5) for titration is mL; Y
The required amount of true oxidizing agent (5.1.5) for blank test titration is m]. 1m test pan.
The separation result shall be accurate to 9.01%.
5.6-2 When the method specified in 5.1.2.2 is used to absorb the liquid, the content of colloid shall be expressed as a percentage of mass and calculated according to formula (4:
0.28 (V:-)
Wherein: Va——the volume of standard sulfuric acid required for titration [5.1.5>, L1) If the standard titration solution is not completely determined by the doctor, the test results shall be used appropriately. Tivi
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GB/T 8088--1999
V,---The volume of standard sulfuric acid drop (5,1.5) required for blank test.mI.:---The quality of the sample, name.
Analysis results should be within (.%.
6 Precision
The precision and reproducibility of the test samples were calculated by RS272 and the results of the type 1 precision test for the averaged samples and the averaged samples are listed in Tables 1 and 2 respectively. The use of the guidance is shown in Appendix A (Recommended Record).
General rubber products
Combined rising
Pingluoke content
Total (m/ni?
Juice: Repeatability = Relative percentage
1 Type 1 homogenized product test
Repeatability () = Mean value relative percentage efficiency: Reproducibility, quality self-efficiency
(R=Reproducibility, relative percentage, Table 2
Peak value
Appropriate value
Balance and quality
Note: 7- Maximum precision
Precision
Un-homogenized sample test
(-)- Reproducibility, relative percentage, R=Reproducibility quality percentage:
() 2. Reproducibility, average other state percentage, test report
The test report shall include the following contents:
c) Abbreviation and use method of this standard; b) Details of product marking:
d) Method used to indicate analytical results! ) Test record for new test materials:
) Note on the following during the test: 5. 53
Reproducibility between experiments
Reproducibility that can be verified
Any operation not included in this standard or the standards referenced in this standard, as well as any operation that is considered optional; multiple) test date,
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Dimensional boundary band
GB/T8088-1999
Appendix A
(Suggestive judgment appendix)
Guide to the quick use of precision results
A The general order of the quick use of precision results is as follows: Symbol 1: T2 represents the absolute difference between two measured values at any point (that is, do not forget positive or negative.
A2 At the position closest to the average of the ten test data means (measurement parameters), check the corresponding material density table (of any test parameter). This line is to use the corresponding (r), R, and R) judgment process. A3 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A3.1 For a pair of pairs, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A3.2 For the difference between the means of two tests, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A4 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A4.1 The absolute difference between the two independent test means of the same material measured by two laboratories using normal and correct net explosion test procedures is 1:1, (consistent)/2×10. The absolute difference between the two independent test means of the same material measured by two independent test ...) Abbreviation and the method used in this standard; b) Details of product labeling:
) Method used to indicate the analysis results! ) Test reagent record for new test materials:
) Note the following during testing: 5. 53
Reproducibility between experiments
Reproducibility that can be verified
Any operation not included in this standard or the standards referenced in this standard, as well as any operation that is considered optional; multiple) test date,
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Dimensional boundary band
GB/T8088-1999
Appendix A
(Suggestive judgment appendix)
Guide to the quick use of precision results
A The general order of the quick use of precision results is as follows: Symbol 1: T2 represents the absolute difference between two measured values at any point (that is, do not forget positive or negative.
A2 At the position closest to the average of the ten test data means (measurement parameters), check the corresponding material density table (of any test parameter). This line is to use the corresponding (r), R, and R) judgment process. A3 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A3.1 For a pair of pairs, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A3.2 For the difference between the means of two tests, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A4 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A4.1 The absolute difference between the two independent test means of the same material measured by two laboratories using normal and correct net explosion test procedures is 1:1, (consistent)/2×10. The absolute difference between the two independent test means of the same material measured by two independent test ...) Abbreviation and the method used in this standard; b) Details of product labeling:
) Method used to indicate the analysis results! ) Test reagent record for new test materials:
) Note the following during testing: 5. 53
Reproducibility between experiments
Reproducibility that can be verified
Any operation not included in this standard or the standards referenced in this standard, as well as any operation that is considered optional; multiple) test date,
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Dimensional boundary band
GB/T8088-1999
Appendix A
(Suggestive judgment appendix)
Guide to the quick use of precision results
A The general order of the quick use of precision results is as follows: Symbol 1: T2 represents the absolute difference between two measured values at any point (that is, do not forget positive or negative.
A2 At the position closest to the average of the ten test data means (measurement parameters), check the corresponding material density table (of any test parameter). This line is to use the corresponding (r), R, and R) judgment process. A3 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A3.1 For a pair of pairs, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A3.2 For the difference between the means of two tests, under normal and correct test procedures, the difference between the means of two tests obtained with samples of nominally the same material shall not exceed the value listed in the table. A4 With the values of R and (R), the following general reproducibility criteria can be used for judgment. A4.1 The absolute difference between the two independent test means of the same material measured by two laboratories using normal and correct net explosion test procedures is 1:1, (consistent)/2×10. The absolute difference between the two independent test means of the same material measured by two independent test ...
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