DS DS/EN ISO 11426
DS DSEN SO 11426 1999-MAR-30 Determnaton of gold n gold jewellery alloys - Cupellaton method fre assay
Cart
(empty)
This 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 (o/oo).