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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/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 zinc.Category: p
https://www.iso.org/standard/26426.html
Determination of gold in gold jewellery alloys — Cupellation method (fire assay)Category: w
https://www.gov.si/assets/organi-v-sestavi/MIRS/Plemenite-kovine/Prirocnik-za-kemijske-laboratorije.pdf
- determination of Au in Ni and Pd white gold alloys - determination of Au in gold alloys containing more than 990 ‰ of Au Yellow gold alloys samples Weigh gold alloy sample (m 1 = 220 mg) on the analytical scales (± 0,01mg) Transfer the sample into assay grade Pb foil. Total mass of assay grade Pb should be 6 g. Possibilities: - sample is wrapped only in Pb foil (6 g) - sample is placed in Pb foil and …
https://paperity.org/p/4089580/determination-of-gold-in-gold-jewellery-alloys-by-icp-spectrometry
The Sample Material & the Requirements for the Analysis of Gold The supposition that it will be possible to determine representative gold values with small samples of gold jewellery alloys [8] is supported by the following experimental facts: the arrangement of the elements Au, Ag, Cu, Pd and Ni in the periodic system is reflected in their chemical and physical properties in that in liquid mixtures at the concentration ratios of jewellery alloys …Cited by: 13
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