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ISO/CD 25644

Jewellery and precious metals — Determination of gold — ICP-OES method using an internal standard element

General information

Current stage: 30.00 Effective date: Jun 16, 2025

Originator: ISO

Owner: ISO/TC 174

Type: International Standard

Scope

This document describes an analytical method for the determination of gold with a nominal content of up to 990 ‰ (per mil), including alloys according to DIN EN ISO 9202 using inductively coupled plasma emission spectrometry. Preferentially the gold content of the alloys lies between 50 ‰ (parts per thousand) and 990 ‰ gold.

Life cycle

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IN_DEVELOPMENT
ISO/CD 25644
30.00 Committee draft (CD) registered
Jun 16, 2025