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Jewellery — Determination of platinum in platinum jewellery alloys — Inductively coupled plasma (ICP) solution-spectrometric method using yttrium as internal standard element
The preferred platinum content of the alloys lies between 850 ‰ (parts per thousand) and 950 ‰ platinum.
Platinum jewellery alloys can contain silver, indium, gallium, copper, cobalt, nickel, tin and ruthenium. The presence of these alloying elements has not been observed to interfere with the determination method. If other elements are alloyed, a check is made as to whether any interference occurs.
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