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YS/T 239.2-2010 English PDF

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YS/T 239.2-2010: Methods for chemical analysis of antimony trisulfide. Part 2: Determination of combined sulfur content. Combustion-neutralization titration method

YS/T 239.2: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
YS/T 239.2-2010English209 Add to Cart 3 days [Need to translate] Methods for chemical analysis of antimony trisulfide. Part 2: Determination of combined sulfur content. Combustion-neutralization titration method   YS/T 239.2-2010
YS/T 239.2-1994English199 Add to Cart 2 days [Need to translate] Chemical analysis of antimony trisulfide. The barium sulfate gravimetric method for determination of combined sulfur Obsolete YS/T 239.2-1994

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Basic data

Standard ID YS/T 239.2-2010 (YS/T239.2-2010)
Description (Translated English) Methods for chemical analysis of antimony trisulfide. Part 2: Determination of combined sulfur content. Combustion-neutralization titration method
Sector / Industry Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard H13
Classification of International Standard 77.120.01
Word Count Estimation 6,683
Date of Issue 2010-11-22
Date of Implementation 2011-03-01
Older Standard (superseded by this standard) YS/T 239.2-1994
Quoted Standard YS/T 239.3
Regulation (derived from) MIIT (2010) No. 126
Issuing agency(ies) Ministry of Industry and Information Technology
Summary This standard specifies the antimony trisulfide Determination of sulfur compounds. This standard applies to the compounds of antimony trisulfide Determination of sulfur content. Measuring range: mass fraction of sulfur compounds 24. 50% ~ 28. 50%.

YS/T 239.2-2010: Methods for chemical analysis of antimony trisulfide. Part 2: Determination of combined sulfur content. Combustion-neutralization titration method


---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Methods for chemical analysis of antimony trisulfide.Part 2. Determination of combined sulfur content.Combustion-neutralization titration method ICS 77.120.01 H13 People's Republic of China Nonferrous Metals Industry Standard Replacing YS/T 239.2-1994 Antimony trisulfide chemical analysis Part 2. Determination of the amount of sulfur compound Combustion and titration Part 2. Determinationofcombinedsulfurcontent- Issued on. 2010-11-22 2011-03-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

YS/T 239 "Methods for chemical analysis of antimony trisulfide" There are seven sections. --- Part 1. Determination of antimony content cerium sulfate titration; --- Part 2. Determination of the amount of sulfur compounds and combustion titration method; --- Part 3. Determination of free sulfur content and combustion titration method; --- Part 4. aqua regia insolubles - Gravimetric method; --- Part 5. Determination of arsenic content of arsenic molybdenum blue spectrophotometric method; --- Part 6. Determination of iron content of phenanthroline spectrophotometry; --- Part 7. Determination of lead content by flame atomic absorption spectrometry. This section is in accordance with GB/T 1.1-2009 given rules drafted. This is Part 2. The partial replacement of YS/T 239.2-1994 "Determination of sulfur compounds of antimony trisulfide Methods for chemical analysis of barium sulfate gravimetric method." versus YS/T 239.2-1994 compared to this part of the following changes. --- Barium sulfate gravimetric method to combustion and methods; --- Text format has been modified; --- Complements the precision and quality assurance and control provisions. This standard by the national non-ferrous metals Standardization Technical Committee (SAC/TC243) centralized. This standard is drafted by. Tin Mine flash-antimony industry limited liability company. This section is drafted. Tin Mine flash-antimony industry limited liability company. Participated in the drafting of this section. Hunan Chenzhou Mining Co., Ltd., Hunan Nonferrous Metal Research Institute. The main drafters of this section. Cuide Hai, Song should ball, Baoli Hui, Wu Shaobo, Zhang Xuelian. This part of the standard replaces the previous editions are. --- YS/T 239.2-1994; --- GB 3255.2-1982. Antimony trisulfide chemical analysis Part 2. Determination of the amount of sulfur compound Combustion and titration

1 Scope

This section YS/T 239 specifies the method for determination of antimony trisulfide in the amount of sulfur compounds. This section applies to antimony trisulfide compound in the determination of sulfur content. Measurement range. mass fraction of sulfur compounds 24.50% ~ 28.50%.

2 Normative references

The following documents for the application of this document is essential. For dated references, only the dated version suitable for use herein Member. For undated references, the latest edition (including any amendments) applies to this document. YS/T 239.3 trisulfide chemical analysis of antimony - Determination of free sulfur content and combustion titration method

3 Method summary

High temperature combustion of oxygen in the sample stream is converted to sulfur dioxide, hydrogen peroxide absorbed and converted to sulfuric acid to methyl red - methylene Blue solution as indicator, titrated with sodium hydroxide standard titration solution. The results obtained by subtracting the amount of free sulfur.

4 Reagents

Unless otherwise indicated, the reagents used in this section refer to water and recognized analytical reagent and tertiary water. 4.1 potassium hydroxide. 4.2 anhydrous calcium chloride. 4.3 hydrogen peroxide solution (119). 4.4 phenolphthalein indicator (10g/L ethanol). 4.5 methyl red - methylene blue mixed indicator. 20 parts of methyl red ethanol solution (0.3g/L) and 3 parts of methylene blue solution (1g/L) and mixed. 4.6 sodium hydroxide standard titration solution [c (NaOH) about 0.2mol/L]. 4.6.1 preparation. Weigh 8g sodium hydroxide, placed in 250mL beaker, after cooling of freshly boiled water to dissolve and transferred to 1000mL capacity Dilution bottle with the new boiling cooling water to volume, and mix. Stored in plastic bottles. 4.6.2 Calibration. Weigh 1.0000g three previously 100 ℃ ~ 105 ℃ drying 2h potassium hydrogen phthalate (reference reagent) and placed 300mL conical flask, add water to dissolve 60mL, add 2 drops of phenolphthalein (4.4), (4.6) titrated with sodium hydroxide standard titration solution To light red is the end. Along with the calibration blank test. According to equation (1) calculate the standard volumetric sodium hydroxide solution (4.6) of the actual concentration. c = m × 1000 (V1-V0) × 204.2 (1) Where. c --- sodium hydroxide standard titration solution (4.6) of the actual concentration in units of moles per liter (mol/L);

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