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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (29): 157-160.

• 水产 渔业 • 上一篇    下一篇

海洋沉积物中砷和汞联测方法的探讨

陈财珍 吴成业   

  • 收稿日期:2012-05-10 修回日期:2012-08-13 出版日期:2012-10-15 发布日期:2012-10-15
  • 基金资助:

    福建省海洋与渔业局重点项目

Investigation of Simultaneous Determination of Arsenic and Mercury in Marine Sediments

  • Received:2012-05-10 Revised:2012-08-13 Online:2012-10-15 Published:2012-10-15

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摘要：

为了提高检测效率，采用微波消解-原子荧光法研究海洋沉积物中砷和汞的联测技术，通过实验优化仪器参数和微波消解体系，以15 g/L硼氢化钾为还原剂，用200 g/L氨基磺酸溶液消除亚硝酸根(NO2-)对测定的干扰。结果表明，本方法对砷和汞标准曲线的线性回归系数均在0.999以上，砷和汞的检测限分别为0.02 mg/kg和0.002 mg/kg，相对标准偏差分别为2.63%和2.84%。本方法具有操作简便、快速、准确性高等优点，可用于同时检测海洋沉积物中砷和汞。

关键词: 互认, 互认

Abstract:

To promote improvement of detection efficiency, the method was investigated for the simultaneous determination of arsenic and mercury in marine sediments with microwave digestion by atomic fluorescence spectrometry. The influence of instrument parameters and digestive system were optimized. 15 g/L KBH4 was selected as reducing agent. The influence of NO2- was avoided by 200 g/L amido-sulfonic acid. The results showed that, two elements exhibited good linearity and the regression coefficients were all over 0.999. The developed method showed limits of detection of 0.02 mg/kg for arsenic, 0.002 mg/kg for mercury and relative deviatiaons of 2.63% for arsenic, 2.84% for mercury. The improved method, its simplicity, rapidity and accuracy had good suitability for the simultaneous determination of arsenic and mercury in marine sediments.