NEN-EN-ISO 11426
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
active, Most Current
| Organization: | NEN |
| Publication Date: | 1 October 2016 |
| Status: | active |
| Page Count: | 23 |
| ICS Code (Jewellery): | 39.060 |
scope:
NEN-EN-ISO 11426 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
NEN-EN-ISO 11426
October 1, 2016
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
NEN-EN-ISO 11426 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...
January 1, 1999
Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
This standard specifies a cupellation method (fire assay) for the determination of gold in gold jewellery alloys. Preferably the gold content of the alloys lies between 333 and 930 parts by mass per...