YS/T 1084.2-2015 English PDF

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YS/T 1084.2-2015: Methods for chemical analysis methods of crude selenium. Part 2: Determination of silver content. Flame atomic absorption spectrometric method

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YS/T 1084.2-2015	209	Add to Cart	3 days	Methods for chemical analysis methods of crude selenium. Part 2: Determination of silver content. Flame atomic absorption spectrometric method

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Basic data

Standard ID: YS/T 1084.2-2015 (YS/T1084.2-2015)
Description (Translated English): Methods for chemical analysis methods of crude selenium. Part 2: Determination of silver content. Flame atomic absorption spectrometric method
Sector / Industry: Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard: H13
Classification of International Standard: 77.120.99
Word Count Estimation: 6,657
Date of Issue: 2015-04-30
Date of Implementation: 2015-10-01
Regulation (derived from): Ministry of Industry and Information Technology Announcement (2015 No. 28)
Issuing agency(ies): Ministry of Industry and Information Technology
Summary: This Standard specifies the method for the determination of the amount of silver in crude selenium. This Standard applies to the determination of the amount of crude selenium and silver. Determination of the range of 5.0 g /T ~ 8 000.0 g /T.

YS/T 1084.2-2015: Methods for chemical analysis methods of crude selenium. Part 2: Determination of silver content. Flame atomic absorption spectrometric 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.
(Crude selenium chemical analysis - Part 2. Determination of silver content - Flame atomic absorption spectrometry) ICS 77.120.99 H13 People's Republic of China Nonferrous Metals Industry Standard Methods for chemical analysis of crude selenium Part 2. Determination of silver content Flame Atomic Absorption Spectrometry Part 2. Determinationofsilvercontent- Issued on. 2015-04-30 2015-10-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

YS/T 1084 "crude selenium chemical analysis method" is divided into two parts. --- Part 1. Determination of the amount of gold fire assay gravimetric method and atomic absorption spectrometry; --- Part 2. Determination of silver content - Flame atomic absorption spectrometry. This section YS/T 1084 Part 2. This section drafted in accordance with GB/T 1.1-2009 given rules. The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) and focal points. This section is responsible for drafting. Guangzhou Research Institute of Nonferrous Metals, Tongling Nonferrous Metals Group Holdings Limited. Participated in the drafting of this section. Nantong Exit Inspection and Quarantine, Beijing General Research Institute of Mining and Metallurgy, Yanggu Yoshimitsu Copper Co., Ltd., Zhuzhou Smelter Lian Group Co., Ltd., Hunan Nonferrous Metal Research Institute, Ltd. Guangdong pilot dilute material. The main drafters of this section. Daifeng Ying, Chen Xiaolan, Lin Shan, Wu Yong, Li Qinmei, Xiaoling, Xiao-Yan Chen, Wang Fang, Douhuai Zhi, Shi Bo Yang, And LI Xian, Zheng Lixia, Yang Deli, Wang Chaoying, Feng Zhenhua, Qi month flower, Pang Wenlin. Methods for chemical analysis of crude selenium Part 2. Determination of silver content Flame Atomic Absorption Spectrometry

1 Scope

YS/T 1084 This section provides the determination of the amount of crude selenium and silver. This section applies to the determination of the amount of crude selenium and silver. Determination of the range of 5.0g/t ~ 8000.0g/t.

2 Method summary

The silver content in a sample using at 5.0g/t ~ 300.0g/t nitric acid, hydrochloric acid to dissolve the sample, volatile sulfuric acid addition of selenium, the volume fraction Determination of 10% hydrochloric acid medium silver content; in a sample silver content > 300.0g/t using nitric acid to dissolve ~ 8000.0g/t, the volume fraction 25% hydrochloric acid medium atomic absorption spectrometer the absorbance was measured at 328.1nm silver.

3 Reagents

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 3.1 hydrochloric acid (ρ = 1.19g/mL). 3.2 nitric acid (ρ = 1.42g/mL) 3.3 hydrochloride (11). 3.4 hydrochloride (13). 3.5 sulfate (11). 3.6 silver standard stock solution. Weigh 0.5000g of silver (wAg≥99.99%), placed in 100mL beaker, add a little water, add 10mL Nitric acid (3.2), low-temperature heating to dissolve the oxides of nitrogen purge boiling, remove the cooling. Brown moved into the 500mL flask, add 15mL Nitric acid (3.2), the solution was diluted with water to the mark and mix. 1mL solution containing 1mg silver. 3.7 Silver standard solution. Pipette 50.00mL standard silver stock solution (3.6) in a brown 500mL volumetric flask, 25mL of nitric acid was added (3.2), the solution was diluted with water to the mark and mix. This solution 1mL containing 100μg silver.

4 Instrument

Atomic absorption spectrometer, with a silver hollow-cathode lamp. Under optimum working conditions for those who can reach the following indicators can be used. --- Characteristic concentration. consistent with the measurement of the sample solution matrix solution, wherein the concentration of silver is not more than 0.02μg/mL. --- Precision. measuring the absorbance of 11 with the highest concentration of the standard solution, the relative standard deviation should not exceed 1.0%; the lowest concentration Degree standard solution (not "zero" concentration of the standard) measuring the absorbance of 11 times, the relative standard deviation should not exceed 0.5%. --- 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 Ratio of not less than 0.7. ......

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