UNE-EN ISO 11494:2019 Jewellery and precious metals - Determination of platinum in platinum alloys - ICP-OES method using an internal standard element (ISO 11494:2019) (Endorsed by Asociación Española de Normalización in November of 2019.)
2019UNE-EN ISO 11494:2019 Jewellery and precious metals - Determination of platinum in platinum alloys - ICP-OES method using an internal standard element (ISO 11494:2019) (Endorsed by Asociación Española de Normalización in November of 2019.)
2017UNE-EN ISO 11494:2017 Jewellery - Determination of platinum in platinum jewellery alloys - ICP-OES method using yttrium as internal standard element (ISO 11494:2014)