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为测定复杂矿石数克试样中百万分之几的金,且误差小于0.1ppm,必需发展一种特效的分析方法.电热原子吸收光谱法测定少量试样中微量金,不受其他元素干扰,是最适宜的仪器分析方法,然而其关键是复杂类型矿石的溶解及需要一个分离方法.目前通常采用有机溶剂萃取溶液中金,如用甲基异丁酮从4～6M盐酸溶液中萃取金.这样萃取重现性虽好,但含金在微克级或更低的范围内,通常存在的脉石成份和铁、铜、钼、钛、铬及锌等影响萃取,使萃取系数受到很大的影响.其他一些方法常使
For the determination of several parts per million of gold in several grams of samples of complex ores, with an error of less than 0.1 ppm, an analytical method of special effects has to be developed. Trace amounts of gold in a small number of samples are determined by electrothermal atomic absorption spectrometry without interference from other elements , Is the most suitable instrument analysis method, however, the key is the dissolution of complex types of ore and the need for a separation method.At present, organic solvents are usually used to extract gold in solution, such as methyl isobutyl ketone extracted from 4 ~ 6M hydrochloric acid solution of gold . Although this extraction reproducibility is good, but the gold in the microgram level or lower range, the presence of gangue components and iron, copper, molybdenum, titanium, chromium and zinc affect the extraction, the extraction coefficient greatly affected Other ways are often used