ISO 5724:2023 PDF
Jewellery and precious metals — Determination of very high purity gold — Difference method using ICP-MS
Jewellery and precious metals — Determination of very high purity gold — Difference method using ICP-MS
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 9
- Дата публикации:
- 15 августа 2023 г.
- Издание:
- ISO IS 5724 edition 1 version 1
- ICS:
- 39.060
This document specifies an analytical procedure for the determination of very high purity gold with a nominal content of and above 999,99 ‰ (parts per thousand, by mass), using an inductively coupled plasma mass spectrometer (ICP-MS).
Abstract
Overview
ISO 5724:2023 - "Jewellery and precious metals - Determination of very high purity gold - Difference method using ICP‑MS" defines an analytical procedure for measuring . The method uses dissolution in diluted aqua regia followed by inductively coupled plasma mass spectrometry (ICP‑MS) to quantify trace impurities and derive gold fineness by difference (1 000 ‰ minus summed impurities).
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