NF EN ISO 11426

NF EN ISO 11426

February 1999
Standard Cancelled

Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

Le présent document prescrit une méthode de coupellation (essai au feu), pour le dosage de l'or contenu dans les alliages d'or jaune et les alliages d'or blanc, ainsi que les alliages ayant une teneur en or égale ou supérieure à 990 ‰ en masse, utilisés pour la bijouterie-joaillerie.

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Main informations

Collections

National standards and national normative documents

Publication date

February 1999

Number of pages

11 p.

Reference

NF EN ISO 11426

ICS Codes

39.060   Jewellery

Classification index

A06-201

Print number

1 - 12/03/2004

International kinship

ISO 11426:1997

European kinship

EN ISO 11426:1998
Sumary
Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

Le présent document prescrit une méthode de coupellation (essai au feu), pour le dosage de l'or contenu dans les alliages d'or jaune et les alliages d'or blanc, ainsi que les alliages ayant une teneur en or égale ou supérieure à 990 ‰ en masse, utilisés pour la bijouterie-joaillerie.
Standard replaced by (1)
NF ISO 11426
April 2015
Standard Cancelled
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay)

ISO 11426:2014 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. ISO 11426:2014 is intended to be used as the recommended method for the determination of fineness in alloys covered by ISO 9202.

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