Simultaneous determination of As and Hg in salt by hydride generation atomic fluorescence spectrometry

Simultaneous determination of As and Hg in salt by hydride generation atomic fluorescence spectrometry was developed. The authors studied the effects of different sample pretreatment methods on the determination results and explored the optimal experimental conditions for simultaneous determination of As and Hg. Under the optimized condition,linearity range for the determination of As was found to be 0~10.0 μg/L,and Hg to be 0~2.0 μg/L. The detection limits of the method for As and Hg were 0.004 3 μg/L and 0.003 2 μg/L,respectively. The relative standard deviation was found to be 0.37% of As and 0.61% of Hg. The recovery rate of the method varies from 97.80% to 102.40% for As and from 96.78% to 100.80% for Hg. Experimental results show this method is simple,rapid and sensitivity,and can be applied to the simultaneous determination of As and Hg in salt with satisfactory results.