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https://www.iso.org/standard/57647.html
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 …Category: p
https://link.springer.com/article/10.1007/BF03214719
As a result of recent research and development work supported by World Gold Council, Inductively Coupled Plasma Spectrometry (ICP) is rapidly emerging as a serious and viable alternative to the centuries-old cupellation or fire assay method for the determination of gold in gold jewellery alloys.Cited by: 13
https://www.iso.org/standard/26426.html
Determination of gold in gold jewellery alloys — Cupellation method (fire assay) This standard has been revised by ISO 11426:2014 General informationCategory: w
https://standards.globalspec.com/std/83708/iso-11426
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 1, 1997 ...
https://paperity.org/p/4089580/determination-of-gold-in-gold-jewellery-alloys-by-icp-spectrometry
In the particular case of coloured and white gold jewellery alloys, it is clear from the ISO-TC 174 working document N 50 [3] that, for the analytical determination of the gold in gold-based alloys, greater precision is specified than for the main components of common base metal alloys.Cited by: 13
https://www.gov.si/assets/organi-v-sestavi/MIRS/Plemenite-kovine/Prirocnik-za-kemijske-laboratorije.pdf
For these purposes also a special internationally harmonized technical standard EN ISO 11 426 (1999): Determination of gold in gold jewellery alloys – Cupellation method (fire assay) has been adopted.
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