YS/T 239.5-2010 English PDF

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YS/T 239.5-2010: Methods for chemical analysis of antimony trisulfide. Part 5: Determination of arsenic content. Arsenic molybdenum blue spectrophotometric method

YS/T 239.5: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
YS/T 239.5-2010	209	Add to Cart	3 days	Methods for chemical analysis of antimony trisulfide. Part 5: Determination of arsenic content. Arsenic molybdenum blue spectrophotometric method
YS/T 239.5-1994	199	Add to Cart	2 days	Chemical analysis of antimony trisulfide Gravimetric method for determination of hydrochloric acid insolubles	Obsolete

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Basic data

Standard ID: YS/T 239.5-2010 (YS/T239.5-2010)
Description (Translated English): Methods for chemical analysis of antimony trisulfide. Part 5: Determination of arsenic content. Arsenic molybdenum blue spectrophotometric method
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H13
Classification of International Standard: 77.120.01
Word Count Estimation: 6,623
Date of Issue: 2010-11-22
Date of Implementation: 2011-03-01
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 arsenic content. This standard applies to arsenic antimony trisulfide content. Measuring range: 0. 010% Arsenic mass fraction 0. 25%.

YS/T 239.5-2010: Methods for chemical analysis of antimony trisulfide. Part 5: Determination of arsenic content. Arsenic molybdenum blue spectrophotometric 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 5. Determination of arsenic content.Arsenic molybdenum blue spectrophotometric method ICS 77.120.01 H13 People's Republic of China Nonferrous Metals Industry Standard Antimony trisulfide chemical analysis Part 5. Determination of arsenic content Arsenic molybdenum blue spectrophotometric method Part 5. Determinationofarseniccontent- 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 is Part 5. This section is in accordance with GB/T 1.1-2009 given rules drafted. Division into new parts. 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. Beijing Mining Research Institute, Shandong Yanggu Yoshimitsu Copper Co., Ltd., Hunan Chenzhou Mining shares have Limited. The main drafters of this section. Wu Donghua, Song should the ball, and then Zhao Ying, Zhang Wei, Wang Jianling, Ye Fangfang. Antimony trisulfide chemical analysis Part 5. Determination of arsenic content Arsenic molybdenum blue spectrophotometric method

1 Scope

This section YS/T 239 specifies the method for determination of arsenic, antimony trisulfide amount. This section applies to the determination of arsenic, antimony trisulfide amount. Measurement range. 0.010% mass fraction of arsenic to 0.25%.

2 Method summary

Sample was dissolved with sulfuric acid, hydrochloric acid solution in not less than 9mol/L, the arsenic trichloride was extracted with benzene to coexist with the substrate, and other miscellaneous Mass separation. After back-extracted with water and oxidized to pentavalent arsenic and arsenic, plus ammonium molybdate and hydrazine sulfate generate arsenic molybdenum blue wavelength spectrophotometer Measuring the absorbance at 660nm.

3 Reagents

Unless otherwise indicated, the reagents used in this section refer to water and recognized analytical reagent and tertiary water. 3.1 sulfate (ρ1.84g/mL). 3.2 hydrochloride (ρ1.19g/mL). 3.3 benzene. 3.4 sulfate (120). 3.5 sulfate (11). Sulfite 3.6 (12). 3.7 Sodium hydroxide solution (300g/L). stored in a plastic bottle. 3.8 Sodium hydroxide solution (50g/L). stored in a plastic bottle. 3.9 iodine solution (5g/L). Weigh 0.5g iodine, 1g of potassium iodide in 250mL beaker, 5mL water was added to dissolve, dilute to 100mL, stored in a brown bottle. 3.10 ammonium molybdate solution (15g/L). Weigh 1.5g of ammonium molybdate [(NH4) 6Mo7O24 · 4H2O] placed in 250mL beaker, add 40mL water, add 50mL sulfuric acid (3.5), transferred to a glass bottle after cooling. Diluted with water to 100mL, and mix. 3.11 hydrazine sulfate solution (0.5g/L). 3.12 phenolphthalein indicator (1g/L ethanol). 3.13 arsenic standard stock solution Weigh 0.1320g trioxide (wAs2O3≥99.9%, advance through the 100 ℃ ~ 110 ℃ drying 2h placed in the dryer to cool to room Temperature), sodium hydroxide solution was added 20mL (3.8) was dissolved clear, was added 100mL of water, 10 mL of sulfuric acid (3.5) and transferred to 1000mL capacity Dilution bottle with water to volume, and mix. This solution 1mL arsenic 100μg. 3.14 Arsenic standard solution Pipette 10.00mL arsenic standard stock solution (3.13) in 100mL volumetric flask, dilute with water to volume, and mix. This solution 1mL Arsenic 10μg. ......

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