ISO 11426
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
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| Organization: | ISO |
| Publication Date: | 15 December 2014 |
| Status: | inactive |
| Page Count: | 14 |
| ICS Code (Jewellery): | 39.060 |
scope:
This International Standard specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. The gold content of the alloys should preferably lie between 333 and 999 parts per thousand (‰).
The procedure is applicable specifically to gold alloys incorporating silver, copper, and zinc. Some modifications are indicated where nickel and/or palladium are present in the so-called white gold alloys, as well as for alloys containing 990 or more parts per thousand (‰) of gold.
This International Standard is intended to be used as the recommended method for the determination of fineness in alloys covered by ISO 9202.
Document History
March 1, 2021
Jewellery and precious metals — Determination of gold — Cupellation method (fire assay)
This document specifies a cupellation method (fire assay) for the determination of gold on a material considered homogeneous. The gold content of the sample lies preferably between 100 and 999,5...
December 15, 2014
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
This International Standard specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. The gold content of the alloys should preferably lie between 333 and...
ISO 11426
December 15, 2014
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
This International Standard specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. The gold content of the alloys should preferably lie between 333 and...
December 1, 1997
Determination of Gold in Gold Jewellery Alloys - Cupellation Method (Fire Assay)
A description is not available for this item.
January 1, 1993
Determination of Gold in Gold Jewellery Alloys - Cupellation Method (Fire Assay) First Edition; (CEN EN 31426:1994)
A description is not available for this item.