电感耦合等离子体发射光谱法测定多金属矿石中砷、锑的方法研究

Determination of arsenic and antimony in polymetallic ores by inductively coupled plasma emission spectrometry

本文介绍了电感耦合等离子体发射光谱法测定多金属矿石中的砷、锑。在选择样品前处理方法时,分别采用(1+1,V/V)王水水浴溶矿与HNO_(3)、HCl、HF、HClO_(4)混合酸溶矿方法,通过加标回收试验、国家Ⅰ级标准物质的测量,并与原子荧光光谱法和容量法进行了比对,结果令人满意。条件实验确定了分析谱线的选择、酸度的选择以及溶样时间的确定等实验条件。方法检出限为:砷32μg·g^(-1)、锑33μg·g^(-1),测定下限为:砷128μg·g^(-1)、锑132μg·g^(-1),精密度(RSD,n=7)小于5%。

This paper describes the determination of as and SB in polymetallic ores by inductively coupled plasma.The method of(1+1,V/V)Aqua regia water bath dissolution and mixed acid dissolution of nitric acid,hydrochloric acid,hydrofluoric acid and perchloric acid were adopted in the sample pretreatment,it was compared with the atomic fluorescence spectroscopy method and the volumetric method with satisfactory results.The experimental conditions,such as the choice of analytical lines,the choice of acidity and the determination of sample dissolution time,were determined.The detection limit was 32μg·g^(-1) for arsenic and 33μg·g^(-1) for antimony.The lower limit was 128μg·g^(-1) for arsenic and 132μg·g^(-1) for antimony.The precision(RSD,n=7)was less than 5%.