YS/T 1084.2-2015 (YST1084.2-2015)

Standard ID	Contents [version]	USD	STEP2	[PDF] delivered in	Standard Title (Description)	Related Standard	Status	PDF
YS/T 1084.2-2015	English	209	Add to Cart	3 days [Need to translate]	Methods for chemical analysis methods of crude selenium. Part 2: Determination of silver content. Flame atomic absorption spectrometric method	YS/T 1084.2-2015		YS/T 1084.2-2015

YS/T 1084.2-2015
(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 deviati