同时测定饮用水中As和Hg的原子荧光光谱法

Simultaneous Determination of Arsenic and Mercury in Drinking Water by Atomic Fluorescence Spectrometry

目的探讨同时测定饮用水中砷和汞的检测方法。方法采用原子荧光光谱法对原子化器的高度、灯电流、还原剂、酸度、NaBH4 用量等条件的测试 ,确立了最佳分析条件。结果砷的测定范围为0～40ng/ml,相关系数0 9995 ,检出限0 10ng/ml;汞的测定范围为0～8ng/ml,相关系数0 9993 ,检出限0 02ng/ml。两者精密度在0 94 %～5 61 %之间 ,回收率在94 %～110 %之间。

Objective To explore the method for simultaneous determination of arsenic and mercury in drinking water. Methods Atomic fluorescence spectrometry was applied for simultaneous determination of arsenic and mercury in drinking water. The best working conditions of the determination, such as the height of flame of atomizer, current of hollow cathode lamp, reducer, acidity and required amount of NaBH 4 were defined in this assay. Results The determination range of arsenic, the correlation coefficient and detection limit for arsenic were 0～40 ng/ml,0 999 5 and 0 10 ng/ml respectively, and were 0～80 ng/ml, 0 999 3 and 0 02 ng/ml for mercury respectively. The precisions and recovery rates of the simultaneous determination of arsenic and mercury in drinking water were 0 94%～5 61% and 94%～110%. Conclusion This method with advantages such as simple, rapid, sensitive, high accuracy and less interference, was suitable for simultaneous determination of arsenic and mercury in drinking water.