ISO 11426 Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay) - Third Edition
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- Картотека зарубежных и международных стандартов
International Organization for Standardization
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay) - Third Edition
N 11426
Annotation
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.
Автоматический перевод:
Драгоценности - Определение золота в золотых ювелирных сплавах - метод Cupellation (запускают испытание) - Третий Выпуск
Этот Международный стандарт определяет cupellation метод (испытание огня) для определения золота в золотых ювелирных сплавах. Содержание золота в сплавах должно предпочтительно находиться между 333 и 999 частями за тысячу (‰).
