原子荧光法联测海洋生物中砷和汞方法的改进

Improvement of simultaneous determination of arsenic and mercury in marine organism by atomic fluorescence spectrometry

摘要: 本文运用微波消解,对原子荧光法联测海洋生物中砷和汞的方法进行改进,对仪器条件、微波消解体系、还原剂硼氢化钾浓度等条件进行优化,消除亚硝酸根(NO2-)对测定的干扰。本方法经研究改进后,砷和汞的检测限分别为0.02mg/Kg和0.002mg/Kg;相对标准偏差分别为2.83%和2.05%;通过分析验证,改进后的方法简单、灵敏、结果可靠,可用于海洋生物中砷和汞联测。

Abstract: The method was presented for the simultaneous determination of arsenic and mercury in marine organism by microwave digestion-atomic fluorescence spectrometry.The influence of instrument parameters,digestive system, KBH4 concentration were optimized.The influence of NO2- was avoided.The developed method showed limits of detection of 0.02mg/Kg for arsenic , 0.002 mg/Kg for mercury and relative deviatiaons of 2.83% for arsenic ,2.05% for mercury.The method，its simplicity,sensitivity and reliability,has good suitability for the simultaneous determination of arsenic and mercury in marine organism.