DS/EN 31426:1994
Determination of gold in gold jewellery alloys-Cupellation method(fire assay)

Standard No.

DS/EN 31426:1994

Release Date

1994

Published By

Danish Standards Foundation

Status

Be replaced 1999-03

Replace By

DS/EN ISO 11426:1999

Latest

DS/EN ISO 11426:1999

Scope

This International 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 thousand (%o) of gold. The procedure applies 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. NOTE 1 This method is intended to be used as the ref-eree method for the determination of fineness in the alloys covered by ISO 9202.

DS/EN 31426:1994 history

• 1999 DS/EN ISO 11426:1999 Determination of gold in gold jewellery alloys - Cupellation method (fire assay)
• 1994 DS/EN 31426:1994 Determination of gold in gold jewellery alloys-Cupellation method(fire assay)