Simultaneous Determination of Arsenic and Selenium in Water by Atomic Fluorescence Spectrum

Objective To establish a method for simultaneously analyzing arsenic and selenium in water by atomic fluorescence spectrum.Methods Double-path atomic fluorescence spectrum was used to analyze arsenic and selenium in water simultaneously.Results The detection limits of arsenic and selenium with the method were 0.008 8 ng/ml and 0.02 ng/ml;The recovery rates were 95.5%-101.4% for arsenic and 94.5%～100.6% for selenium;relative standard deviations were 1.7%-4.2% for arsenic and 2.7%-7.8% for selenium.There was good correlation coefficient(0.999 8) of arsenic in concentration range of 1.0-10.0 ng/ml.There was good correlation coefficient(0.999 3) of selenium in concentration range of 2.0-20.0 ng/ml.There was no significant difference between the detection values obtained by this method and national standard method(GB/T 5750-2006)(P0.05).Conclusion The method both simplifies the operation process and reduces detection time.