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https://cdn.standards.iteh.ai/samples/57647/eea5560996de4ed090e6b5262e51e53b/ISO-11426-2014.pdf
Jewellery — Determination of gold in gold jewellery alloys — Cupellation method (fire assay) 1 Scope 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 (‰).
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.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 ...
http://dpi-proceedings.com/index.php/dtmse/article/download/6910/6502
the one of copper in gold jewelry alloy. Intrduced determination of gold, silver and copper atom percent by EDXRF into Eq. 3, and lattice constant ax for the samples are shown in Table 3. The quality of gold solid solution can be obtained by the following Eq. 4. i n i p p i m m x ∑m xAuthor: Hui Li, Fei Duan, Xuan Wang, Yong Zhu, Ying-kun Gong
https://www.scientific.net/AMR.1120-1121.1350
This paper based on the principle of crystallography, deduced the mathematical relationship between the crystallographic parameters, the density and the impurities content in gold jewelry alloys, then introduced the results by density testing and determination of Ag and Cu by EDXRF into the mathematical relationship, and obtained the gold weight percent in gold jewelry alloys.Author: Hui Li, Shao Jun Shi, Xuan Wang, Yong Zhu, Ning Yu, You Jian Wang
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: w
https://www.iso.org/standard/26426.html
Determination of gold in gold jewellery alloys — Cupellation method (fire assay)Category: w
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.gia.edu/doc/Methods-for-Determining-Gold-Content-of-Jewelry-Metals.pdf
on the ratio of fine gold to total metal present (by we&], but it divides the total metal present into 24 parts. Thusl each karat is 1/24 (by weight) of the whole [4.17%1 or 41.7 ppt). The 583-ppt gold alloy [seven parts gold and five parts alloy metal) discussed above can be described in karats as: 7/(7+5) = 7/12 = 14/24 = 141~
https://www.callagold.com/education/gold-jewelry-alloys/
Mar 11, 2019 · Yellow Gold for Jewelry Making Yellow Gold used in jewelry making is a gold alloy mix that consists of combining gold, copper and silver. Yellow gold purity is also measured in karats. Yellow gold is the only type of gold that can be used in jewelry making as 24-karats.Reviews: 66
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