Abstract: The trace arsenic in aquatic foods was measured by microwave digestion coupled with the hydride generation-atomic fluorescence spectrometry (HG-AFS). The instrumental parameters and analytical conditions, including lamp (As-HCl) current, carrier gas flow, atomization stove temperature, acid medium, KBH4 concentrations and reducing agents, were investigated and optimized. Under optimum conditions linear response ranged from 0 to 80μg/Lwith R2≥0.999. The average recovery tested with adding standards was 96.3%, and the detection limit estimated with 3-fold standard deviation was 0.021μg/kg. The established method, with the advantages of simple operation, high sensitivity, and high efficiency, was successfully used for the determination of As in some aquatic foods.

Key words:  , hydride generation-atomic fluorescence spectrometry (HG-AFS)； arsenic； aquatic foods； microwave digestion；