British Standards Institution

Source:: ISO
Committee:: STI/53 - Specifications and test methods for jewellery and horology
Categories:: Standardization. General rules | Measurement and Science | Measurement. Volume, mass, density, viscosity | Testing | Manufacturing | Precision mechanics | Jewellery | Metallurgy | Metal testing

Scope

This document describes an analytical method for the determination of silver in jewellery alloys 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 silver content of the alloys lies between 50 ‰ (parts per thousand) and 990 ‰ silver.

NOTE Lower contents of silver can be analyzed with this method.

Purpose

Silver in jewellery alloys is typically performed in the precious metal industry by Volumetric (potentiometric) method. This method allows to determine all elements in a precious metal alloy with one method at the same time and is less influenced by other elements.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

12/06/2023

Proposal end date:

05/07/2023

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

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Standards Development

ISO/PWI 19919.2 Jewellery and precious metals – Determination of silver in silver alloys – ICP-OES method using an internal standard element

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