微波消解-氢化物发生原子荧光光谱法测定进口铜锍中砷和汞

来源期刊：冶金分析2011年第5期

论文作者：葛钰玮 索金玲 王成 胡晓民

文章页码：67 - 70

关键词：微波消解； 原子荧光光谱法； 铜锍； 砷； 汞

Key words：microwave digestion； atomic fluorescence spectrometry； copper matte； arsenic； mercury

摘    要：建立了测定进口铜锍样品中砷、汞含量的氢化物发生原子荧光光谱法。在铜锍试样中加入王水和氢氟酸,经微波消解后稀释,消解液中加入硫脲-抗坏血酸预还原,加硼氢化钾使砷和汞生成硼氢化物,用原子荧光光谱法测定砷和汞含量。铜、铁、硫等对待测元素基体效应不显著。在选定条件下,砷和汞的检出限分别为0.003 9μg/L和0.060 8μg/L,样品的加标回收率在95%～123%之间,砷和汞的相对标准偏差分别为0.56%和2.0%(n=6),方法可用于大批铜锍样品中砷和汞的测定。

Abstract: A determination method of arsenic and mercury in imported copper matte by hydride generation-atomic fluorescence spectrometry(AFS) was established.The copper matte samples were digested in aqua regia and hydrofluoric acid by microwave.Then,the solution was diluted.The thiourea and ascorbic acid were added into digestion solution for prereduction Arsenic and mercury were made to form hydride by adding potassium borohydride.The contents of arsenic and mercury were determined by AFS.The results indicated that the matrix effect of Cu,Fe and S on the determination of elements was not obvious.Under the selected conditions,the detection limits were for arsenic and mercury were 0.003 9 μg/L and 0.060 8 μg/L,respectively.The recoveries of standard addition were 95%-123%,and the relative standard deviations(RSD,n=10) were 0.56 % and 2.0 % for arsenic and mercury,respectively.The proposed method could be used for the determination of arsenic and mercury in large quantities of copper matte samples.