Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay) (ISO 11426:2014, Corrected version 2014-12-15); German version EN ISO 11426:2016— 14 стр.
Jewellery and precious metals - Determination of gold - Cupellation method (fire assay) (ISO/DIS 11426:2020); German and English version prEN ISO 11426:2020
Jewellery - Determination of gold in gold jewellery alloys - Cupellation method (fire assay) (ISO 11426:2014, Corrected version 2014-12-15); German version EN ISO 11426:2016— 14 стр.