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GB/T 21198.6-2007 English PDF

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GB/T 21198.6-2007: Determination of precious metals in precious metals jewellery alloys -- Method using ICP spectrometry -- Part 6: Difference method
Status: Obsolete
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GB/T 21198.6-2007English399 Add to Cart 3 days [Need to translate] Determination of precious metals in precious metals jewellery alloys -- Method using ICP spectrometry -- Part 6: Difference method Obsolete GB/T 21198.6-2007

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Basic data

Standard ID GB/T 21198.6-2007 (GB/T21198.6-2007)
Description (Translated English) Determination of precious metals in precious metals jewellery alloys -- Method using ICP spectrometry -- Part 6: Difference method
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard Y88
Classification of International Standard 39.060
Word Count Estimation 10,136
Date of Issue 2007-11-12
Date of Implementation 2008-07-01
Quoted Standard GB 11887; GB/T 12806-1991; GB/T 12808-1991
Regulation (derived from) China National Standard Approval Announcement2007 No.12 (Total No.112)
Issuing agency(ies) General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary This standard specifies the determination of gold by, palladium alloy jewelery impurity elements method to determine the precious metal content, platinum. This section applies to the identified GB 11887 gold, platinum, purity palladium jewelery range, where the gold content is 725% to 999 % platinum content is 800% to 999 % to 800% palladium content to 999 %.

GB/T 21198.6-2007: Determination of precious metals in precious metals jewellery alloys -- Method using ICP spectrometry -- Part 6: Difference method


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Determination of precious metals in precious metals jewellery alloys Method using ICP spectrometry Part 6. Difference method ICS 39.060 Y88 National Standards of People's Republic of China Determination of precious metal jewelery alloys precious metal content ICP Spectrometry Part 6. Subtraction Posted 2007-11-12 2008-07-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released

Foreword

GB/T 21198 "precious metal jewelery alloys precious metal content using ICP spectrometry" is divided into six parts. --- Part 1. Determination of platinum content platinum jewelery alloys using yttrium as internal standard; --- Part 2. Determination of platinum content platinum alloy jewelry using platinum all trace elements and the intensity ratio method; --- Part 3. Determination of palladium jewelery alloys using palladium content of yttrium as internal standard; --- Part 4. Determination of 999 ‰ precious metal jewelery alloys precious metal content of subtraction; Part --- Article 5. 999 ‰ silver jewelery alloys - Determination of silver content difference of subtraction; --- Part 6. Subtraction. This section GB/T 21198 Part 6. This part is proposed by the China National Light Industry Council. This part of the National Standardization Technical Committee jewelry (SAC/TC256) centralized. This section drafted by. National Gold and Silver Products Quality Supervision and Inspection Center (Nanjing), National Jewelry Quality Supervision and Inspection Center. The main drafters of this section. Donghui, Fu Rong Jin, Li , Lisu Qing, Li Wujun. Determination of precious metal jewelery alloys precious metal content ICP Spectrometry Part 6. Subtraction

1 Scope

GB/T 21198 provisions of this section by the determination of gold, platinum and palladium jewelery alloys impurity elements to determine the precious metal content method. This section applies to the determination of GB 11887 gold, platinum, palladium jewelery purity range where the gold content of 725 ‰ ~ 999 ‰, platinum content 800 ‰ ~ 999 ‰, palladium content of 800 ‰ ~ 999 ‰. Note. may contain platinum, gold, palladium, silver, copper, nickel, cobalt, iron, zinc, cadmium, ruthenium, rhodium and iridium and other elements jewelry.

2 Normative references

The following documents contain provisions which, through reference GB/T 21198 in this section constitute provisions of this section. For dated reference documents Member, all subsequent amendments (not including errata content) or revisions do not apply to this section, however, encouraged to reach under this section Parties to research agreement to use the latest versions of these documents. For undated reference documents, the latest versions apply to this section. GB 11887 jewelry precious metal purity and designation of (GB 11887-2002, ISO 9202.1991, NEQ) GB/T 12806-1991 laboratory glassware single marking flask (eqv ISO 1042. 1983) GB/T 12808-1991 laboratory glassware single marking pipette (eqv ISO 648.1997)

3 PRINCIPLE OF THE METHOD

Sample with aqua regia dissolution in hydrochloric acid medium, as measured by ICP spectrometer content of impurity elements. By subtraction, to obtain precious metals content.

4 reagent material

Unless otherwise indicated in the analysis using only recognized as analytical reagents and distilled or deionized water or equivalent purity. 4.1 pure platinum, purity of not less than 99.99%. 4.2 gold, purity of not less than 99.99%. 4.3 pure palladium purity of not less than 99.99%. 4.4 silver purity of not less than 99.99%. 4.5 pure copper, the purity of not less than 99.99%. 4.6 pure nickel, purity of not less than 99.99%. 4.7 pure cobalt, purity of not less than 99.99%. 4.8 iron purity of not less than 99.99%. 4.9 pure zinc, the purity of not less than 99.99%. 4.10 pure cadmium, purity of not less than 99.99%. 4.11 hydrochloric acid, mass fraction of 36% ~ 38%, ρ = 1.19g/mL. 4.12 nitric acid, mass fraction of 65% ~ 68%, ρ = 1.40g/mL.

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