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  • BSI
    BS EN ISO 11426:2021 Jewellery and precious metals. Determination of gold. Cupellation method (fire assay)
    Edition: 2021
    $313.97
    / user per year

Description of BS EN ISO 11426:2021 2021

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 (‰) by weight. Fineness above 999,5 ‰ can be determined using a spectroscopy method by difference (e.g. ISO 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 ‰ 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 ISO 9202.



Standard NumberBS EN ISO 11426:2021
TitleJewellery and precious metals. Determination of gold. Cupellation method (fire assay)
StatusDefinitive
Publication Date2021-03-29
ReplacesBS EN ISO 11426:2016
Identical National Standard OfEN ISO 11426, ISO 11426
DescriptorsReproducibility, Assay, Determination of content, Jewellery, Quantitative analysis, Gold, Specimen preparation, Chemical analysis and testing, Combustion test methods, Gold alloys, Non-ferrous alloys, Extraction methods of analysis, Control samples
ICS39.060 Jewellery
CommitteeSTI/53
ISBN978 0 539 06911 2
PublisherBSI
Pages16

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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