Jewellery and precious metals. Determination of very high purity gold. Difference method using ICP-MS
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This document specifies an analytical procedure for the determination of very high purity gold with a nominal content of and above 999,99 ‰ (parts per thousand, by mass), using
an inductively coupled plasma mass spectrometer (ICP-MS).
BSI recommends this version of standard for organisations operating in or with the UK. The ISO edition is available here if required.