Determination of mercury by electric heat digestion and atomic fluorescence spectrometry

Objective To develop a method to determine mercury by electric heat digestion and atomic fluorescence spectrometry.Methods After electric heat digestion using aqua regia,the soil samples were determined by atomic fluorescence spectrometry.Results The linear range of the method was from 0 to 50 μg/L.The correlation coefficient was 0.9994.The detection limit of the method was 0.005μg/L.The relative standard deviations ranged from 1.55% to 6.52%.Four soil samples for quality control were determined by this method and all of the results were in the range of the true values.Conclusion The optimized method have many advantages,such as high sensitivity,few interferences,wide linearity.At the same time,it is simple and rapid.