Objective:To establish a method for simultaneous determination of mercury and arsenic content in edible fish using atomic fluorescence spectroscopy.Method:Microwave digestion method was used to preprocess the sample,and atomic fluorescence spectroscopy was used to simultaneously determine the mercury and arsenic content in edible fish(freshwater and seawater fish),and the detection results were analyzed.Result:Mercury has a good linear relationship at 0～10.0 μg·mL-1,while arsenic has a good linear relationship at 0～40.0 μg·mL-1,with a correlation coefficient greater than 0.999.The detection limit of mercury is between 2.50 μg·mL-1and 3.83 μg·mL-1,with a recovery rate of 94.1%to 99.0%and RSD of 2.9%;the detection limit of arsenic is between 2.30 μg·mL-1 and 3.68 μg·mL-1,the recovery rate is 93.3%～99.2%,the RSD is 2.0%.Comparison shows that the mercury and arsenic content in edible seawater fish is higher than that in freshwater fish(P＜0.05).Conclusion:Atomic fluorescence spectroscopy is simple to operate and has high detection sensitivity,and can simultaneously determine the mercury and arsenic content in edible fish.
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