This part of GB/T 5070 specifies the method for determining the amount of silicon dioxide by molybdenum blue photometry. This part is applicable to the determination of silicon dioxide in magnesium-chromium refractories. The determination range (mass fraction) is 1.00% to 10.00%. GB/T 5070.2-2002 Chemical analysis methods for magnesium-chromium refractories Part 2: Determination of silicon dioxide by molybdenum blue photometry GB/T5070.2-2002 Standard download decompression password: www.bzxz.net

Tr. 81.080
National Standard of the People's Republic of China
CB/r5070.15070.12—2002
Generation 5373.1---507.101525
Chemical analysis of magnesiu chromile refracturies2002-1231Promulgated by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
2003-06-01Implementation
ICS 81.u80
National Standard of the People's Republic of China
CB/T 5070.2—2002
GE/T 3070, 2--[S85] Chemical analysis of magnesia chromite refractories-Part 2: Determination of silicon dioxide by molybdenum blue photometric method Issued on 2002-12-31 General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Implementation on 2003-06-01 G/T 5070.2—2002 G[T070] Chemical analysis of magnesia chromite refractories-Part 2: Determination of silicon dioxide by molybdenum blue photometric method Part 1: EDA for the determination of the content of alkanes in plasticized aluminum: Part 2: EGIA for the determination of the content of calcium oxide by HDTA mass method: Part 3: CyDTA for the determination of the content of calcium monoxide: Part 4: ETA for the determination of the content of ferrous trioxide by mass method; Part 5: Determination of the content of manganese oxide by hydrophilic absorption method: Part 6: Determination of the content of sodium oxide by hydrophilic atomic absorption spectroscopy: Part 7: Determination of the content of calcium oxide by HDTA mass method: Part 8: Determination of the content of sodium oxide by ferrous acid mass method; Part 9: Determination of the content of manganese oxide by hydrophilic atomic absorption spectroscopy: Part 10: Determination of the content of sodium oxide by hydrophilic atomic absorption spectroscopy. Part 1 of this part This part replaces CB 507 (.·-1985) - Chemical analysis of magnesium complexes - Determination of the chemical reaction of blue 3. The main features of this part compared with 607085 are as follows: "previous", "normative references", "quality assurance plan" and "test report"; the sample preparation has been detailed and the modification of the provisions for the increase or decrease of the dangerous condensation has been made. The original \ is added with 1m car glue-clotting liquid, and immediately added. m2 flow avoidance model "change to "add mL grass sulfur content slowly mixed liquid, according to uniform, release), mi2mit, add 5mt ferrous acid wave \: Part 1: Standard structure and writing principles? According to 151-20 standards as a guide, GB21-3001 international standard compilation Part 1: Chemical analysis of the existing specifications of the six parts of the standard appendix, the Ministry of Industry and Information Technology of the Central Plains National Metallurgical Industry and the Ministry of Science and Technology of China National Technical Committee for Standardization of Metallurgical Materials (CSES/1193) is responsible for this part. Part 1 drafting unit: China Academy of Fire Engineering. Part 2 editors: Kuai Hong, Liang Xianchu, Mi Yucha. The standard replaced by this part is: GH 0.3-195 Scope 1 Chemical analysis method for magnesium-chromium refractories Part 2: Determination of silicon dioxide content by blue photometry B, TS? This part stipulates the method for evaluating the content of blue oxide in the North, GB/T 5070. 2—2002
This part is applicable to the determination of the content of carbon dioxide in magnesium pyrotechnic materials. The determination range is 1,000-10.C0%2Normative references
The clauses in the following documents become clauses of this part through the applicability of this part. For the relevant referenced documents, all subsequent amendments (excluding errors) do not apply to this part. However, the parties to the agreement on this part may apply to the latest versions of these documents. For any referenced documents without an indication of date, the latest version applies to this part.
GT/T5373.：2002 Chemical analysis methods for magnesium complex refractory materials Part 1: Determination of average loss on burn by weight G3/T87 Peak test period
G/T325 Sampling and acceptance rules for shaped products
GH/112825
Laboratory glass instruments burette
GB/T1256 Laboratory version Receiver single cup line bottle GKI-299S
Experimental case Carbon end receiver single standard line aspiration operation
GB/T7G:7
Pre-fire raw material indefinite refractory materials: sampling 3 original buried
sample pressure carbon-acid concentrated mixture melt contact·dilute salt load was taken. Also, about 2mm, in the salt carrier, the monobasic acid and ammonium sulfate form a polysilicon acid, which is reduced by adding oxalic acid-acid to eliminate the lower resistance of phosphorus and magnesium, and then reduced to silicon with ferrous sulfate, and the absorbance is measured at 690° on a spectrophotometer. Reagents: 1.1 Solvent: 2.0 g/L anhydrous sodium hydroxide and 1.2 g aldehyde (NH4OH) are mixed, 4.2 g/mol·mol·4H4O3. L): Filter and press 4.3 Pre-mix ferrous iron 40g 1. Weigh ammonium bis(eS0) [H2O3 + H2O4] in water, add 5% (1) water to dilute 100mL, mix. After the mixture is dissolved, use H2O. Prepare 4.4 Aldehyde with acid solution. Weigh 15% chlorinated hydrate (H2O2) (dissolved in 23% chlorinated hydrate), dilute to 10:L with water. 4.5 Hydrochloric acid 1:1S>. 4.7 Standard concentration of monoxide (containing S1r/m) collected at 0.C and calcinated for about 2h in a desiccator and cooled to room temperature. . Must) platinum add 3 permanent carbon magnetic agent, cover and seal the medical dry 1000 production temperature furnace 5mia1--10m, double mountain, cold mail, in a 100ml tetraethylene beaker containing 100ml water, low temperature heat did not take out the molten waste until the effect is completely smooth: use hot water to wash out the cover, cool to room temperature. Transfer to 2m. volume bottle (3.1), sieve with water until the change. Store in a plastic bottle.
GB/T5070.2-2002
4.8 Oxidation standard (SiC.gmI) use my rate sound 5.2) 0.CL-based approval (4.71ml. bottle (. only, dilute with water to the scale, use the time is correct, 5 fast instruments
5. "Deng Guang Ai meter.
5.2 Transfer tube: GBT 12808A years old
5.3 Dormitory: GB/T12805A type:
5.4 Capacity distance: GB/T126A type:
6 Sampling
5.1 Sampling steps
G/10325 and GB/T1?617 sampling laboratory details: 6.2 Tooth sample preparation
G5/T5070.12CC2 5.2 Preparation of service samples, 7 Analysis steps
7. Number of determinations
Measure the test multiple times under the same repeatability conditions.
7.2: Test material
Take 3.10% of the sample and make a blank test under the conditions of reproducibility.
7.3 Blank test
Make a blank test under the conditions of reproducibility.
7.4 Verification test
Make a blank test under the conditions of reproducibility with the same extraction standard. 7.5 Determination
7.5.1 Place the sample in a container containing 28 The name of the flux (1.1): 16% pure flux (1.. Cover the original temperature of 00~00℃ and leave a gap. Heat to 33~1100℃, bake for 5min, rotate for 15min, make the material uniform, cool: 7.5.2, use filter paper to clean the end of the wall, reduce the amount of 6Vml! 4.5! The burnt cattle. Read the hot leaching solution to eliminate the brightness - wash with water and transfer to a 10L bottle at room temperature. 7.5.3 Transfer 13.00m1 of the test tube: 1.2: 2 and 6% of the sample (quality) 5m of the blank total volume.
7.5.4 Add 10ml 7.5 alcohol (4.5l) of liquid (.2), ​​and the room is filled with 20mim of net low-10°C in a bath at about 30°C.
7.5.5 Add 50ml of rapid flow (=.According to the sentence, 0.Fmin--2mir. 5ml. Comb the money of the pants (4.3) with wood thin half scale, ladder hook:
7.5.6 with 0.5 (m absorption blood spectrometer wavelength 3m, with convex or liquid as Li than the test product without reason 7.E work curve loaded with the comprehensive system
with titration (3) shift double 0,1,00,2.00,3,C01.9,5,23,60,,w,8.00m two more chemical meter standard emperor 4, wind about wear bottle add.5 I 4. Add water to. The following is connected 7.5.15. Knead the coin.5 m absorption III, spectrophotometric reduction factor e, with the formula agent as the ratio of the absorbance of the plot package Dongshan line
8 analysis result calculation
8.1 chemical production as much as possible using the mass fraction Si0,> calculated·the value is expressed in %, the following documents are calculated: so
in the line to make the test wave of the second chemical member of the position, the unit is gram (); the number of test filtration products, the unit is liter (ml.): the value of the test product, the unit is liter (mL) the mass of the sample, single beam (g) GB/T 5070.2—2002
8.2 Whether the analytical card is valid depends on whether the analytical value of the reference substance analyzed under normal conditions is consistent with the standard value. When the difference between the standard value of the reference substance and the standard value is not greater than the specified difference, the sample analysis is valid; otherwise, it is invalid. 8.3 When the difference between the two analytical values ​​of the reference substance is not greater than the specified difference in Table 1, the analytical result is considered valid. It is noted that the data should be processed according to the requirements of the heat record A. 8.4 The result is rounded to two decimal places. If there are requirements in the supply contract or the relevant standards, the required digits can be rounded to two decimal places.
9 The allowable difference
The difference between the two independent tests under the condition of reproducibility is not shown in Table 1. Table 1
One with chemical salt
T. uu -2. Jc
2. .-. 5. uc
5.1--13. ou
10 Quality Assurance and Control
10.1 Verification test shall be carried out according to the provisions of 7.1
10.2.1 The instrument shall be regularly tested with the same basic standard material. If the instrument is replaced, the working curve shall be newly drawn and controlled. Test Report
The acceptance report shall include the following contents: Unit:
Sample weight
Extension Result:
Used standard (CB/Tb00,2-212);
Comparison with the specified analysis steps (if necessary) 1. Common phenomena observed during the test (if necessary): Test date.
GB/T 5070.2—2002
Respectfully follow 1.,
,*, ​​, E
, a depreciation;
! List,
Appendix AbZxz.net
(Normative Appendix》
Acceptance Analysis Value Procedure
.++++1
Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.