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本文的第一部分已指出欲准确测定岩石、矿物和金中的贵金属,那么已富集的元素在最后测定以前必须对样品作妥善的预处理。对于测定贵金属来说,很多仪器分析和经典分析方法都可采用,但最终选用哪种方法通常取决于已处理好的贵金属的量、样品基体的性质和仪器的适用性。若测定痕量(微克/克范围)的贵金属,那么可用火焰原子吸收法和电感耦合等离子体(ICP)发射光谱。ICP发射光谱法是通常喜欢采用的方法,因为容易进行多元素的联合测定。对于那些贵金属含量低于微克/克的样品,宜采用石墨炉原子吸收和核技术(主要是中子活化法)。对贵金属含量较高甚至达％级的样品,最好用X-射线萤光法测定。此外,为准确测定贵金属,使用标准样品以及实验室内部和实验室之间进行样品分析对照也是必不可少的。
The first part of this article has pointed out that for the accurate determination of precious metals in rocks, minerals and gold, the enriched elements must be properly pre-treated before the final determination. For the determination of precious metals, many instrumental and classical analytical methods are available, but the choice of which method to use ultimately depends on the amount of precious metal that has been processed, the nature of the sample matrix, and the suitability of the instrument. Flame atomic absorption spectrometry and inductively coupled plasma (ICP) emission spectroscopy can be used for the determination of trace metals (microgram / gram range) of precious metals. ICP emission spectrometry is a commonly used method because it is easy to perform multiple elemental determinations. Graphite furnace atomic absorption and nuclear techniques (mainly neutron activation) are preferred for those samples with a noble metal content below micrograms per gram. Samples with higher or even higher% noble metal content are best measured by X-ray fluorescence. In addition, for the accurate determination of precious metals, it is also essential to use standard samples as well as sample analysis controls between the laboratory and the laboratory.