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YS/T 239.7-2010 English PDF

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YS/T 239.7-2010: Methods for chemical analysis of antimony trisulfide. Part 7: Determination of lead content. Flame atomic absorption spectrometric method
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YS/T 239.7-2010English209 Add to Cart 3 days [Need to translate] Methods for chemical analysis of antimony trisulfide. Part 7: Determination of lead content. Flame atomic absorption spectrometric method   YS/T 239.7-2010

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Basic data

Standard ID YS/T 239.7-2010 (YS/T239.7-2010)
Description (Translated English) Methods for chemical analysis of antimony trisulfide. Part 7: Determination of lead content. Flame atomic absorption spectrometric 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
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 lead content. This standard applies to antimony trisulfide lead content. Measuring range: mass fraction of lead to 0. 050% 0. 0020%.

YS/T 239.7-2010: Methods for chemical analysis of antimony trisulfide. Part 7: Determination of lead content. Flame atomic absorption spectrometric method


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Methods for chemical analysis of antimony trisulfide.Part 7. Determination of lead content.Flame atomic absorption spectrometric method ICS 77.120.01 H13 People's Republic of China Nonferrous Metals Industry Standard Antimony trisulfide chemical analysis Part 7. Determination of lead content Flame Atomic Absorption Spectrometry Part 7. Determinationofleadcontent- 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 7. 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. Hunan Nonferrous Metal Research Institute, Hunan Chenzhou Mining Co., Ltd. The main drafters of this section. Yaoxing Na Song should ball, Yang Ping, Pang Wenlin, Chen Hongmin, Yang Deli. Antimony trisulfide chemical analysis Part 7. Determination of lead content Flame Atomic Absorption Spectrometry

1 Scope

This section YS/T 239 provides for antimony trisulfide determination of lead content. This section applies to the determination of the amount of lead antimony trisulfide. Measurement range. 0.0020% mass fraction of Pb to 0.050%.

2 Method summary

Sample dissolution with hydrochloric acid and nitric acid evaporated, the repetitive addition hydrobromide volatile antimony. In dilute hydrochloric acid medium, using air - acetylene flame at Atomic absorption spectrometer wavelength 283.3nm measured absorbance lead.

3 Reagents

Unless otherwise indicated, the reagents used in this section refer to water and recognized analytical reagent and tertiary water. 3.1 hydrochloride (ρ1.19g/mL). Nitrate 3.2 (ρ1.42g/mL). 3.3 hydrobromide (ρ1.50g/mL). 3.4 hydrochloride (11). 3.5 nitric acid (11). 3.6 lead standard stock solution Weigh 1.0000g lead (wPb≥99.99%) in 200mL beaker, add 20mL of nitric acid (3.5), heat gently to dissolve completely, boil The oxides of nitrogen purge, cooled to room temperature. Moved into 1000mL volumetric flask, supplemented with 20mL of nitric acid (3.5), diluted with water to the mark, mix uniform. This solution 1mL lead 1mg. 3.7 lead standard solution Pipette 10.00mL lead standard stock solution (3.6) in 100mL flask, add 5mL hydrochloric acid (3.4), diluted with water to the mark Degree, and mix. This solution 1mL lead 100μg.

4 Instrument

Atomic absorption spectrometer, with a lead hollow cathode lamp. Under optimum working conditions for those who can reach the following indicators can be used. --- Characteristic concentration. a solution in the measurement matrix consistent solution, characterized in lead concentration should not exceed 0.20μg/mL. --- Precision. standard solution with the highest concentration of 10 times the absorbance measurements, the standard deviation should not exceed the average absorbance of 1.0%; With the lowest concentration of standard solution (not "zero" concentration of the standard) measuring the absorbance of 10 times, the standard deviation should not exceed the maximum 0.5% concentration of the standard average absorbance. --- Linear curve. The curve is divided into five sections according to concentration, absorbance difference between the absorbance difference between the highest and the lowest segment of the segment

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