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Determination of Trace Arsenic in Seafood with Microwave Digestion-atomic and Fluorescence Spectrometry

WANG Kai, GAO Qun-yu (College of Light Industry and Food Science, South China University of Technology , Guangzhou 510640, China)  
In this paper, trace arsenic in seafood was measured with microwave digestion-atomic and fluorescence spectrometry. Results showed that the best detection conditions were as following: photomultiplier negative high voltage of 300V, lamp current of 60mA, carrier gas flow rate of 400mL/min, shield gas flow rate of 1000mL/min, reducing agent of 20g/LKBH4-2g/LNaOH solution , and carrier flow of 5% HCl. Within the arsenic content range of 0~10 ng/mL, the linear regression equation was found as y=250.82x+58.86, with the correlation coefficient of 0.9999. The detection limit, the coefficient of variation and recovery ration of arsenic were 0.68%. 91.90%~104.6%, and 0.0716 ng/mL, respectively. The method was simple, sensitive and accurate, which could be used for determination of trace arsenic in seafood.
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