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化学蒸气发生-四通道原子荧光光谱法同时测定水样中的痕量砷、锑、硒和汞
引用本文:李海涛,李中玺,杨晓明,郭跃安,张莹,冯玉怀.化学蒸气发生-四通道原子荧光光谱法同时测定水样中的痕量砷、锑、硒和汞[J].分析试验室,2009,28(4).
作者姓名:李海涛  李中玺  杨晓明  郭跃安  张莹  冯玉怀
作者单位:西北有色地质研究院分析技术及科学仪器研发中心,西安,710054
摘    要:应用自行设计的化学蒸气发生-四通道无色散原子荧光光谱仪,建立了同时测定水样中As、Sb、Se、Hg的新方法.在实验中优化了四元素同时化学蒸气发生条件和测定的最佳工作参数.在样品预处理阶段用HCl将Se6+还原为Se4+,然后用质量浓度5 g/L硫脲将As5+和Sb5+还原为As3+和Sb3+.在最佳条件下,方法对As、Sb、Se、Hg的检出限分别为0.05、0.03、0.05、0.01 ng/mL(3d);RSD分别为0.42%、0.74%、0.97%、1.0%(对5 ng/mL As、Sb、Se和0.5ng/mL Hg混合标准,n=7).用所建立的方法对不同类型水样中的As、Sb、Se、Hg进行了同时测定,测定结果与用标准方法测定所得结果之间无明显差异,各元素的加标回收率在93%~105%.

关 键 词:化学蒸气发生  四通道无色散原子荧光光谱仪  As、Sb、Se、Hg  水样  同时测定

Simultaneous determination of arsenic,antimony,selenium and mercury in water samples by chemical vapor generation-four-channel non-dispersive atomic fluorescence spectrometry
LI Hai-tao,LI Zhong-xi,YANG Xiao-ming,GUO Yue-an,ZHANG Ying,FENG Yu-huai.Simultaneous determination of arsenic,antimony,selenium and mercury in water samples by chemical vapor generation-four-channel non-dispersive atomic fluorescence spectrometry[J].Chinese Journal of Analysis Laboratory,2009,28(4).
Authors:LI Hai-tao  LI Zhong-xi  YANG Xiao-ming  GUO Yue-an  ZHANG Ying  FENG Yu-huai
Abstract:In this work,a robust analytical procedure for the simultaneous determination of arsenic,antimony,selenium and mercury in water samples using chemical vapor generation-four-channel non-dispersive atomic fluorescence spectrometry has been developed.The conditions of instrumentation and vapor generation of arsenic,antimony,selenium and mercury were optimized.Hexavalent Se was reduced to tetravalent Se by heating the sample with HCl,and then pentavalent As and Sb were reduced to the trivalent state by the addi...
Keywords:Chemical vapor generation  Four-channel-nondispersive atomic fluorescence spectrometer  Arsenic  antimony  selenium and mercury  Water sample  Simultaneous determination  
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