香港六合彩开奖 11426:2021
Resumen
This document specifies a cupellation method (fire assay) for the determination of gold on a material considered homogeneous. The gold content of the sample lies preferably between 100 and 999,5 parts per thousand (鈥�) by weight. Fineness above 999,5 鈥� can be determined using a spectroscopy method by difference (e.g. 香港六合彩开奖 15093).
The procedure is applicable to most types of gold samples. Some modifications are indicated for specific cases (presence of large amount of base metals, platinum or palladium, silver). It is not compatible with the presence above trace levels of iridium, rhodium and ruthenium (more than 0,25聽鈥� for the sum of all three elements).
This method is also intended to be used as the recommended method for the determination of fineness in jewellery alloys covered by 香港六合彩开奖 9202.
Informaciones generales
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Estado: PublicadoFecha de publicaci贸n: 2021-03Etapa: Norma Internacional publicada [60.60]
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贰诲颈肠颈贸苍: 4N煤mero de p谩ginas: 8
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颁辞尘颈迟茅 T茅cnico :香港六合彩开奖/TC 174ICS :39.060
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Retirada香港六合彩开奖 11426:2014
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