British Standards Institution

Source:: ISO
Committee:: STI/53 - Specifications and test methods for jewellery and horology
Categories:: Standardization. General rules | Manufacturing | Precision mechanics | Jewellery

Scope

This document specifies a gravimetric method for the determination of platinum in platinum alloys. The platinum content of sample lies preferably between 50 and 999 parts per thousands (‰) by weight. Fineness above 999 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 15093).

This method is also intended to be used as one of the recommended methods for the determination of fineness in jewellery alloys covered by ISO 9202.

Purpose

The planned revision of ISO 11210 opens the scope for the use to not only jewellery alloys, but also to all other precious metal alloys for the use of the standard by refiners.

The technical content was revised and harmonized with other methods for precious metals fineness testing. The harmonization will provide an easier protocol in the testing labs and will therefore faciliate the transfer between different precious metals fineness testings. ISO 11210 is the recommended method for the determination of Platinum.

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

Standard timeline

1. Proposal

Proposal start date:

11/10/2021

Proposal end date:

28/11/2021

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

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Standards Development

ISO/PWI 11210 - Jewellery and precious metals — Determination of platinum in platinum jewellery alloys — Gravimetric method after precipitation using ammonium chloride

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