超声辅助提取氢化物发生原子荧光法测定鹅肉中无机砷

Determination of inorganic arsenic in goose by hydride generation-atomic fluorescence spectrometry after ultrasound-assisted extraction

采用超声提取，以氢化物发生原子荧光法测定了鹅肉样品中无机砷含量。通过比较提取的无机砷与样品中的总砷含量，评价了6mol／L盐酸、1mol／L硝酸、1mol／L磷酸和50％vol甲醇水溶液4种不同提取溶剂下的提取效率。发现6mol／L盐酸的提取效率最高，为61％。同时，以稳定性更好的二甲基硅油作为消泡剂代替了正辛醇，得到更好的精密度。对实验条件优化后，这种无机砷的方法检测限可以达到0．27μg／kg，实验的精密度为1．6％，加标回收率为96．5％～104．0％。这种方法不仅有助于提高检验效率，而且更加环境友好。

A determination method of inorganic arsenic in goose was developed by hydride generation-atomic fluorescence spectrometry （HG-AFS） after ultrasound-assisted extraction. With the comparison of inorganic and total arsenic, the extraction percentage of the four solvents 6mol/L HC1, 1 mol/L HNO3, 1 mol/L H3PO4 and 50%vol methanol-water were evaluated. The extraction percentage of 6mol/L HC1 gave a good efficiency of 61%. Meanwhile, antifoam octanol was replaced by stable dimethieone with better relative standard derivation. The limit of detection of the method was 0.271μg/kg. The relative standard derivation was 1.6%. The recovery was in the range of 96.5%-104.0%. This method was rapid, efficiency and envi- ronmentally fi＇iendly.