BS ISO 11494:2008 Jewellery - Determination of platinum in platinum jewellery alloys - Inductively coupled plasma (ICP) solution-spectrometric method using yttrium as internal standard element
2014BS ISO 11494:2014 Jewellery. Determination of platinum in platinum jewellery alloys. ICP-OES method using yttrium as internal standard element
2009BS ISO 11494:2008 Jewellery - Determination of platinum in platinum jewellery alloys - Inductively coupled plasma (ICP) solution-spectrometric method using yttrium as internal standard element