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YS/T 955.1-2014 English PDF

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YS/T 955.1-2014: Methods for chemical analysis of silver. Part 1: Determination of silver content. Fire assay method
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YS/T 955.1-2014English159 Add to Cart 3 days [Need to translate] Methods for chemical analysis of silver. Part 1: Determination of silver content. Fire assay method Valid YS/T 955.1-2014

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Basic data

Standard ID YS/T 955.1-2014 (YS/T955.1-2014)
Description (Translated English) Methods for chemical analysis of silver. Part 1: Determination of silver content. Fire assay method
Sector / Industry Nonferrous Metallurgy Industry Standard (Recommended)
Classification of Chinese Standard H68
Classification of International Standard 77.120.99
Word Count Estimation 6,621
Date of Issue 10/14/2014
Date of Implementation 4/1/2015
Regulation (derived from) People's Republic of China Ministry of Industry and Information Technology Notice 2014 No. 63; Industry Standard Filing Notice 2014 No. 12 (Overall No. 180)
Issuing agency(ies) Ministry of Industry and Information Technology
Summary This Standard applies to the determination of the amount of crude silver in silver. Measurement range (mass fraction) 40.OO% ~ 99.90%. When the sample contains platinum, palladium, ruthenium, rhodium, iridium and osmium and other platinum group elements,

YS/T 955.1-2014: Methods for chemical analysis of silver. Part 1: Determination of silver content. Fire assay method


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Methods for chemical analysis of silver Part 1. Determination of silver content Fire assay method ICS 77.120.99 H68 People's Republic of China Nonferrous Metals Industry Standard Methods for chemical analysis of crude silver Part 1. Determination of the amount of silver fire assay Part 1. Determinationofsilvercontent-Fireassaymethod Issued on. 2014-10-14 2015-04-01 implementation Ministry of Industry and Information Technology of the People's Republic of China released

Foreword

YS/T 955-2014 "crude chemical analysis of silver" is divided into two parts. --- Part 1. Determination of the amount of silver fire assay; --- Part 2. Flame atomic absorption spectrometry palladium content. This section YS/T Part 1 955. 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) centralized. This section is responsible for drafting unit. Zijin Mining Group Co., Ltd. This section participated in the drafting unit. China Nonferrous Guilin Research Institute of Geology and Minerals Co. Ltd., Guangzhou Nonferrous Metal Research Institute, Hangzhou Fuchunjiang Smelting Co., Ltd., Henan Yuguang Gold & Lead Co., Ltd., Tongling Nonferrous rare metals subsidiary, Zijin Copper Co., Ltd., Jiangxi Copper shares Limited copies. The main drafters of this section. summer pearl, package Weidong, Liu hair, Wang Qian, Shi Yihua, Zhouling Bo, Chen Xiaolan, Wang Fang, Zhang Liao, Zhang mine warfare, Gong Chang together, Wu Zhen Xiang, Wang Tinglong. Methods for chemical analysis of crude silver Part 1. Determination of the amount of silver fire assay

1 Scope

This method is applicable to the determination of crude silver silver content. Measurement range (mass fraction) of 40.00% to 99.90%. When the sample contains platinum, palladium, ruthenium, rhodium, iridium and osmium and other platinum group elements, the method will not apply.

2 principle of the method

The crude sample was wrapped in silver foil lead, at a high temperature molten state cupellation, lead and other metals are oxidized with gold and silver and other precious metals separation, Get together gold and silver tablets, weighing, gold after nitric acid points, minus the amount of gold and silver as measured by post along with the standard correction in a sample calculation of the mass fraction of silver.

3 Reagents and materials

Unless otherwise indicated in the analysis using only recognized as analytical grade reagents and distilled or deionized water or equivalent purity. 3.1 lead foil. pure lead (mass fraction ≥99.99%) processed into a length of about 51mm, a thickness of about 0.1mm square sheet. 3.2 Silver. mass fraction ≥99.99%. 3.3 gold. the mass fraction ≥99.99%. 3.4 nitric acid (ρ = 1.42g/mL). 3.5 nitric acid (17). 3.6 nitric acid (11). 3.7 Glacial acetic acid (ρ = 1.05g/mL). 3.8 acetic acid (13). 3.9 porcelain crucible. 30mL. 3.10 MgO ash pan. with calcined magnesia powder (particle size 0.147mm) and No. 525 by 85.15 portland cement mix, adding a small amount of water, pressed Molding, dry naturally after use. Magnesium oxide ash pan size. diameter 30mm, height 26mm, inner diameter of 30mm, the concave depth 10mm.

4 instruments and equipment

4.1 box-type high-temperature furnace. 4.2 Balance. a sense of the amount of 0.01mg. 4.3 mill machine. small, rolled up to a thickness of 0.1mm. Step 5 Analysis 5.1 gold, silver forecasts given 5.1.1 Weigh 0.4g sample copy, accurate to 0.00001g, wrapped in aluminum foil (3.1), insert the pre-heated ash pan (3.10), and in the box High temperature furnace (4.1) ash blown within 880 ℃. 5.1.2 The combination of gold and silver after blowing ash grain hand hammer tapping on both sides of the brush attachment to bottom in box-type high-temperature furnace (4.1) inside at 750 ℃ ~

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