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试样经浓盐酸加热溶解、挥发除锑后,灰化,王水溶解,用电感耦合等离子体发射光谱法测定锑金精矿中金量。解决了样品在烧样除炭过程中因锑的熔解而结块、在溶解实验过程中因大量锑的水解包裹使金的溶解变得较为困难的问题。采用电感耦合等离子体发射光谱法测定金,克服了原子吸收法测定的线性范围小,而稀释倍率大,造成分析误差偏大的不足。方法的检出限为0.1μg/g。金加标回收率96%～104%,精密度(RSD,n=6)<3.0%。适宜于锑金精矿中金的测定。
The sample was heated and dissolved in concentrated hydrochloric acid, volatile except antimony, ashing and aqua regia, and the content of gold in antimony gold concentrate was determined by inductively coupled plasma atomic emission spectrometry. The problem that the sample is caked by the dissolution of antimony during the process of burning and removing carbon is solved, and the dissolution of gold becomes more difficult due to the hydrolysis and encapsulation of a large amount of antimony during the dissolution experiment. Inductively coupled plasma atomic emission spectrometry was used to determine gold, which overcomes the shortcoming of the linear range determined by atomic absorption spectrometry and the large dilution ratio, resulting in large analysis error. The detection limit of the method is 0.1μg / g. Gold spike recoveries 96% to 104%, precision (RSD, n = 6) <3.0%. Suitable for the determination of gold in antimony gold concentrate.