摘要
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。
A simplified method for the determination of determinate Au in antimony concentrate by ICP-AES is presented.To avoid the disturbing of Sb,the sample was digested using concentrated HCL,and heated to remove Sb by volatilization.After ashing,the sample was digested by aqua regia and Au was analyzed by ICP-AES.This method can well solve the problems that the melting of Sb resulted the caking,during burning the sample to remove carbon and also the dissolution of Au encapsulated by Sb.Compared to use atomic absorption spectroscopy to determine Au,atomic emission spectrometry has much larger linear range,smaller dilution ratio and much smaller analytical error.The detection limit of this method was 0.1μg/g.By the standard addition method,the recovery of known samples was from 96% to 104%,and the relative standard deviation（RSD）（n=6） was within 3%.This method is effective to determinate the Au in antimony concentrate.
出处
《甘肃地质》
2012年第4期77-81,共5页
Gansu Geology
