碱熔-氢化物发生原子荧光光谱法连续测定锑精矿中的砷、铋、硒、锡

Simultaneous Determination of As,Bi,Se and Sn in Antimony Concentrates by Hydride Generation-Atomic Fluorescence Spectrometry Through Sodium Peroxide Melting

建立了氢化物发生原子荧光光谱法测定锑精矿中砷、铋、硒、锡的方法。研究了基体及共存元素的干扰情况,实验表明,在酒石酸、硫脲-抗坏血酸存在下,适当的增加酸度可以有效地消除干扰。采用Na2O2熔解样品,用HCl酸化,无需分离基体,实现了锑精矿中砷、铋、硒、锡的连续测定,其回收率为90.6%～103.8%,检出限分别为0.35、0.20、0.65和0.35μg/L。应用该方法分析了锑精矿样品,结果令人满意。

A method was developed for the simultaneous determination of As, Bi, Se and Sn in the antimony concentrates by hydride generation-atomic fluorescence spectrometry （HG-AFS） , the experiments showed that the interference of matrix and co-existing elements can be avoided by melting the sample with sodium peroxide, adjusting the acid concentration and adding tartaric acid, thiourea-ascorbic acid mixture（Tu-Vc） to the sample solution. The recoveries of the method were 90.6% - 103.8% for As, Bi, Se and Sn. The detec- tion limits were 0.35, 0.20, 0.65 and 0.35 μg,/L, respectively. The method has been applied to the deter- mination of As, Bi, Se and Sn in antimony concentrates with satisfactory results.