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GB/T 11067.7-2024 English PDF

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GB/T 11067.7-2024: Methods for chemical analysis of silver - Part 7: Determination of gold and palladium content - Inductively coupled plasma emission spectrometry
Status: Valid

GB/T 11067.7: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 11067.7-2024English359 Add to Cart 4 days [Need to translate] Methods for chemical analysis of silver - Part 7: Determination of gold and palladium content - Inductively coupled plasma emission spectrometry Valid GB/T 11067.7-2024
GB/T 11067.7-1989English199 Add to Cart 2 days [Need to translate] Silver--Determination of copper, bismuth, iron, lead, gold and antimony contents--Emission spectrometric method Obsolete GB/T 11067.7-1989

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Basic data

Standard ID GB/T 11067.7-2024 (GB/T11067.7-2024)
Description (Translated English) Methods for chemical analysis of silver - Part 7: Determination of gold and palladium content - Inductively coupled plasma emission spectrometry
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H15
Classification of International Standard 77.120.99
Word Count Estimation 18,142
Date of Issue 2024-11-28
Date of Implementation 2025-06-01
Issuing agency(ies) State Administration for Market Regulation, China National Standardization Administration

GB/T 11067.7-2024: Methods for chemical analysis of silver - Part 7: Determination of gold and palladium content - Inductively coupled plasma emission spectrometry


---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 silver - Part 7.Determination of gold and palladium content - Inductively coupled plasma emission spectrometry Silver chemical analysis method Part 7.Determination of gold and palladium content Inductively Coupled Plasma Optical Emission Spectroscopy Methods for chemical analysis of silver- Part 7.Determination of gold and palladium content- Inductively coupled plasma emission spectrometry ICS 77.120.99 CCS H 15 National Standard of the People's Republic of China Released on 2024-11-28 2025-06-01 Implementation State Administration for Market Regulation The National Standardization Administration issued

Table of Contents

Preface ... Ⅲ Introduction Ⅳ 1 Scope ... 1 2 Normative references ... 1 3 Terms and Definitions ... 1 4 Principle ... 1 5 Reagents and Materials ... 1 6 Instruments and Equipment ... 2 7 samples ... 2 8 Test steps ... 2 8.1 Test Materials 2 8.2 Blank test ... 2 8.3 Determination 2 8.4 Drawing of working curve ... 3 9 Experimental data processing ... 3 10 Precision ... 4 10.1 Repeatability ... 4 10.2 Reproducibility 4 11 Test Report ... 4 Appendix A (Informative) Raw data of precision test ... 5

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents" Drafting is required. This document is part 7 of GB/T 11067 "Chemical analysis methods for silver". GB/T 11067 has published the following parts. Part 1.Determination of silver content - Silver chloride precipitation - Flame atomic absorption spectrometry; Part 2.Determination of copper content - Flame atomic absorption spectrometry; Part 3.Determination of selenium and tellurium content - Inductively coupled plasma atomic emission spectrometry; Part 4.Determination of antimony content - Inductively coupled plasma atomic emission spectrometry; Part 5.Determination of lead and bismuth content by flame atomic absorption spectrometry; Part 6.Determination of iron content - Flame atomic absorption spectrometry; Part 7.Determination of gold and palladium content - Inductively coupled plasma optical emission spectrometry. Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents. This document was proposed by China Nonferrous Metals Industry Association. This document is under the jurisdiction of the National Technical Committee on Standardization of Nonferrous Metals (SAC/TC 243). This document was drafted by. Daye Nonferrous Design and Research Institute Co., Ltd., Nanjing Product Quality Supervision and Inspection Institute (Nanjing Quality Development and Advanced Technology Application Research Institute), Beijing Dabo Nonferrous Metal Solder Co., Ltd., CSSC Huanggang Precious Metals Co., Ltd., Jiangxi Copper Co., Ltd. Co., Ltd., Zijin Mining Group Co., Ltd., Jinchuan Group Co., Ltd., Shenzhen Zhongjin Lingnan Nonferrous Metals Co., Ltd. The company's Shaoguan Smelter, Shandong Zhaojin Gold and Silver Refining Co., Ltd., China Nonferrous Guilin Mineral Geology Research Institute Co., Ltd., Guobiao (Beijing) Inspection and Certification Co., Ltd., Beijing Nonferrous Metals and Rare Earth Application Research Institute Co., Ltd., Yunnan Gold Mining Group Precious Metals Testing Co., Ltd. Co., Ltd., Guiyan Testing Technology (Yunnan) Co., Ltd., Tongling Nonferrous Metals Group Holdings Co., Ltd., Jiangsu Beikuang Metal Recycling Technology Co., Ltd. Co., Ltd., Shandong Hengbang Smelting Co., Ltd., and Yunnan Copper Co., Ltd. The main drafters of this document are. Pan Xiaoling, Chen Lan, Gao Ruifeng, Xiong Meiyu, Zeng Jing, Li Bei, Cai Wei, Zhang Fan, Yu Jieli, Zhang Shenghuan, Zeng Yanqiang, Wu Feifei, Zhao Lei, Li Xiaona, Yang Zhifeng, Zhang Zonglei, Qian Hu, Chen Shiyun, Zhang Zhenglian, Zhu Zekun, Xu Lijuan, Chen Xiaoke, Wang Yuanyi, Guo Mingfang, Jie Xue, Wang Lei, Mu Xiumei, Long Xiujia, Qin Fanglin, Zhuang Yukai, Wang Zhaoxia, Li Na, Yao Fang, Feng Yanbo, Zhang Hangbo, Hu Ruifen, Li Mei, Wang Lingyan, Yuan Apeng.

Introduction

Silver is an important strategic resource and precious metal. In addition to being used for jewelry and currency, it is also widely used in photography, electronics, and chemistry. Industry, pharmaceutical industry and national defense industry. Most of the silver ore resources are associated silver ore, and the main associated deposits are gold, lead, zinc, copper, etc. The content of impurity elements in silver is an important factor affecting product quality and smelting value. Copper, bismuth, iron, lead, antimony, selenium, tellurium and palladium are the impurities in pure silver. GB/T 11067 aims to establish a complete, practical and applicable silver product production and The standard method of chemical composition analysis for trade needs. Limited by the length of the document, usage requirements, scope of application, and technical differences between various analytical methods Due to reasons such as independence, GB/T 11067 is planned to consist of 7 parts. Part 1.Determination of silver content Silver chloride precipitation ﹘ flame atomic absorption spectrometry. The purpose is to establish the determination of silver content method. Part 2.Determination of copper content - Flame atomic absorption spectrometry. The purpose is to establish a method for the determination of copper content. Part 3.Determination of selenium and tellurium content Inductively coupled plasma atomic emission spectrometry. The purpose is to establish the selenium and tellurium content. Determination method. Part 4.Determination of antimony content Inductively coupled plasma atomic emission spectrometry. The purpose is to establish the determination of antimony content method. Part 5.Determination of lead and bismuth content - Flame atomic absorption spectrometry. The purpose is to establish a method for the determination of lead and bismuth content. Part 6.Determination of iron content - Flame atomic absorption spectrometry. The purpose is to establish a method for the determination of iron content. Part 7.Determination of gold and palladium content Inductively coupled plasma optical emission spectrometry. The purpose is to establish the determination of gold and palladium content method. GB/T 11067 "Chemical Analysis Methods for Silver" has been implemented for nearly 20 years. The analysis and detection methods are stipulated for the elements. With the opening of the silver market, the quality disputes involving gold and palladium elements in silver ingot transactions are increasing. In view of this, it is urgent to develop a standard test and analysis method for accurately determining the gold and palladium content in silver that is suitable for production, application and trade. to meet the needs of market development. This document supplements the analytical methods for gold and palladium content in silver. The formulation of this document improves GB/T 11067 "Chemical Analysis of Silver" Its formulation is based on the needs of both supply and demand, and can meet the needs of various testing institutions for unified testing basis and domestic and international transactions. It is of great significance to improve the quality of silver products, promote their production, trade and expand their application demand. Silver chemical analysis method Part 7.Determination of gold and palladium content Inductively Coupled Plasma Optical Emission Spectrometry

1 Scope

This document describes the method for the determination of gold and palladium in silver. This document is applicable to the determination of gold and palladium content in silver. The determination range is 0.000 2% to 0.050%.

2 Normative references

The contents of the following documents constitute the essential clauses of this document through normative references in this document. For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies. in this document. GB/T 6682 Specifications and test methods for water used in analytical laboratories GB/T 8170 Rules for rounding off values and expression and determination of limit values

3 Terms and definitions

There are no terms or definitions that require definition in this document.

4 Principle

The sample was dissolved in nitric acid, the gold was separated by filtration, the precipitate was placed in a crucible, burned in a muffle furnace, and a mixture of hydrochloric acid and nitric acid was added at a boiling temperature. The filtrate was dissolved in a water bath. The matrix silver was separated by precipitation with hydrochloric acid. The two solutions were combined and in the hydrochloric acid medium, an inductively coupled plasma atomic emission was used to precipitate the silver. The emission intensity of gold and palladium was measured by a radiometric spectrometer at the wavelength selected for each element, and the mass fraction of gold and palladium was calculated according to the standard working curve method.

5 Reagents and Materials

Unless otherwise stated, only reagents of confirmed analytical grade were used in the analyses. 5.1 Water, in accordance with GB/T 6682, Grade 2 and above. 5.2 Hydrochloric acid (ρ=1.19 g/mL). 5.3 Nitric acid (ρ=1.42 g/mL). 5.4 Hydrochloric acid (1 1). 5.5 Hydrochloric acid (1 4). 5.6 Hydrochloric acid (5 95). 5.7 Nitric acid (1 5). 5.8 Nitric acid (2 98). 5.9 Mixed acid A (3 volumes of hydrochloric acid and 1 volume of nitric acid, prepared and used immediately). 5.10 Mixed acid B (3 volumes of hydrochloric acid, 1 volume of nitric acid and 4 volumes of water, prepared and used immediately). 5.11 Gold standard storage solution. weigh 0.1000 g gold (wAu ≥ 99.99%), place in a 100 mL beaker, add 20 mL of mixed acid A

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