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近年来由于金的普查找矿和成矿规律研究的需要,对金的分析测定提出更高的要求,需要测定地质样品中0.001克/吨,甚至更低含量的金。火焰原子吸收法难以满足这一要求,无火焰原子吸收法测定矿物中微量金已有不少报导。各方法的差异仅是分离富集手段不同。目前广泛采用的分离富集手段有溶剂萃取、离子交换、共沉淀、活性炭吸附和反相萃取色层法等。这些方法均能获得满意的分离富集效果。
In recent years, due to the needs of gold prospecting and mineralization research, gold analysis and determination put forward higher requirements, the need to determine the geological samples of 0.001 g / tonne, or even lower content of gold. Flame atomic absorption method is difficult to meet this requirement, non-flame atomic absorption method for the determination of trace gold minerals have been reported. Differences between the various methods is only different means of separation and enrichment. Currently widely used means of separation and enrichment solvent extraction, ion exchange, coprecipitation, activated carbon adsorption and reversed-phase extraction chromatography and so on. These methods can be satisfied with the separation and enrichment effect.