This standard specifies the determination method of sulfur content in antimony. This standard is applicable to the determination of sulfur content in antimony. Determination range: 0.0020% to 0.25%. GB/T 3253.4-2001 Chemical analysis method for antimony Determination of sulfur content GB/T3253.4-2001 Standard download decompression password: www.bzxz.net

KS 77.123. 60
National Standard of the People's Republic of China
GB/T 3253. 7 ~-3253.62001
Methods for chenicaf analysis of antimony2001- 07 -10 Implementation
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
2001- 12 -01 Issued
1 Scope
National Standard of the People's Republic of China
Methods for chemical analysis of antimony
Determination of sulfur content
Methuis Pnr chemiewl wnulysis uf antimunyDvterminatiun ot sulfur eonlent Two standard methods for determination of sulfur content in standard products: Determination of sulfur content in standard products. Standard: (.C2+-0.25. 2 Method Summary
GB/T3253.4-2001
The cloud material is burned in a high temperature oxygen flow, and the sulfur is quickly converted into sulfur dioxide - absorbed by peroxide and converted into sulfuric acid, and the concentration is titrated with 1% red-1% methyl blue acid as an indicator. The end point is 3 reagents
3.1 Hydrogen peroxide,
3.2 Water chlorination.
3.3 Absorption liquid ( 1123)
3.4 ​​Neutral base and single base indicator; 21 unit volume of red ethanol (01.3g/[. Mix with 3 unit volume of sodium hydroxide (1)
3.5 Standard titration solution (N (I) = 0.005mml/135.1 Preparation: Take 2g of sodium hydroxide, dissolve it in water without sodium dioxide in a 25mL beaker, transfer it to a 1000mL container, and dilute it with water without carbon dioxide until it becomes a paste. Eat less. 3.5.2 Calibration Weigh 5. (0) First, dry the 131% dimethylformamide standard reagent in a control cup with water that does not contain carbon monoxide until it is clear. Dilute it with water that does not contain carbon monoxide to the mark. This solution is 1L 0.00SCg of potassium dialdehyde. Take 1L 0.00SCg of potassium dialdehyde and add 5% water that does not contain carbon monoxide to the cone. Titrate the standard hydrogen ions with 2% ethanol in a standard titration box. The titration wave is slightly red, which is the end point. The same calibration is used for short-term monitoring.
According to the formula (calculated in Sichuan The actual concentration of the standard titration solution of sodium thiocyanate is: VXC.0
Wherein:
The actual concentration of the standard titration solution of sodium thiocyanate, mal/I. The volume of the standard titration solution of potassium hydrogen benzoate consumed when transferring the standard solution, nI. The volume of the standard titration solution of hydrogen consumed when transferring the standard solution. Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 2-07-10 (2)
2001-12-01 The concentration of potassium hydroxide in the standard solution was 1.8/mol. The standard was tested in triplicate, and the values ​​were averaged. The consumed gas was oxidized by the standard titration. The concentration of potassium hydroxide in the standard solution was 1.8/mol. The standard was tested in triplicate, and the values ​​were averaged. The consumed gas was oxidized by the standard titration. The concentration of potassium hydroxide in the standard solution was not averaged. The value of potassium hydroxide in the standard titration was not averaged. The value of potassium hydroxide in the standard titration was not averaged. The value of potassium hydroxide in the standard titration was not averaged. The value of potassium hydroxide in the standard titration was not averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. The standard was tested in triplicate, and the values ​​of potassium hydroxide in the standard titration were averaged. Potassium, Chinese cloth collection, tower modification, Kexing growth, self-hope, 4 glass special flow,
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figure! 5.1 Test material: According to Table 1, determine the sample n.1. and specific gravity, 5.2 Turn on the power, make the furnace temperature reach 100℃, and put it in the automatic control state. 5.3 Add mTmT. The rate of hydrogen absorption and mM red are combined as indicators to form a potential absorber 16. 3253.420C1
5.4 Press the device to open the gas bottle. Adjust the air flow to 21mm, calibrate the density of the meter, and then adjust the oxygen flow rate to G.5T./min. Use the standard wine secretion rate to obtain the perfect color of the Lan competition. Do not read 5.5. Place the test samples in a porcelain container and accept the survival rate and study the rate. Put the material of the sample into the combustion tube, quickly plug the tube and wait for a night to close the flame, pass the fuel gas at a flow rate of m, and use sodium hydroxide to titrate the dark liquid to keep the liquid bright green. 5.6 fuel will be -3nin and i. Increase the oxygen flow rate to 2Lnin. Continue to burn for 2tmir. Continue to use sodium hydroxide to determine the rate of change from purple-red to bright green. The expression of the analysis result is:
The fraction calculated by formula (2):
In the formula: s
1. J15 03
7 allowable difference
YxD.OX100
standard quality question,
the actual concentration of hydrogen hydroxide can be determined by the standard titration rate; the volume of sodium hydroxide standard melt obtained by the test, Ⅱ process: the quality of the sample:
-..---( 2 1
and 1.WInL sodium hydroxide standard disease determination [cN:OH1. l/L appropriate Cool mass r/mal
laboratory closed analysis results are all related values ​​not greater than the allowable considerations in Table 2:
quality cost efficiency
0. 0n2 c-- 0. 005 2
0 on5 c--0.0_n
>..c1G.-0.03n
r.<36 --0. 050
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