电感耦合等离子体原子发射光谱法测定钨铁中砷锑铋

Determination of arsenic,antimony,bismuth in ferro-tungsten by inductively coupled plasma atomic emission spectrometry

研究了电感耦合等离子体原子发射光谱法(ICP-AES)同时测定钨铁中砷、锑、铋含量的分析方法。试样经草酸—过氧化氢分解后,在混酸条件下,钨生成钨酸沉淀与试液分离。经沉淀分离后,试液中钨的含量小于150μg/mL时对测定没有干扰。采用背景校正方式并结合基体匹配方法可以消除少量钨对谱线的干扰。该方法已应用于钨铁中砷、锑、铋含量的测定,加标回收率在95%～105%之间,相对标准偏差为0.86%～3.6%。

The simultaneous determination of arsenic,antimony and bismuth in ferrotungsten was studied by inductively coupled plasma atomic emission spectrometry.The sample was decomposed with oxalic acid and hydrogen peroxide.In the medium of mixed acid,tungsten was converted to tungstate precipitates and thus separated from sample solution.When residual tungsten in sample solution was less than 150 μg/mL,it did not interfere in the determination.The interference of residual tungsten could be eliminated by the background correction mode and matrix matching.The proposed method has been applied to the determination of arsenic,antimony and bismuth in ferro-tungsten,with the recoveries of 95 %-105 %,and the relative standard deviation（RSD） of 0.86 %-3.6 %.