氢化物发生-原子荧光光度法测定保健食品袋泡茶中的总砷

Determination of arsenic in bag tea samples of health food by hydride generator atomic fluorescence spectrometry

目的:本文建立了保健食品袋泡茶中总砷的测定方法并测定了20种保健食品袋泡茶中总砷含量。方法:以微波消解和湿消解法处理样品,原子荧光光度法进行测定。结果:本文测定总砷的线性范围为0μg/L～80μg/L,相关系数为0.9994,方法回收率为92.4%～109.6%,RSD为2.5%。测定的20种保健食品袋泡茶中总砷含量为0.10 mg/kg～0.80 mg/kg。结论:实验表明,本法简单、快速、准确,可以用于保健食品袋泡茶中总砷含量的测定。

Objective：To establish a method of hydride generator atomic fluorescence spectrometry（HG-AFS） to determine arsenic in bag tea samples of 20 kinds of health food.Methods： After microwave or wet digestion,the contents of arsenic in twenty bag tea samples were determined by HG-AFS.Results： Linear range for the determination of arsenic was 0 μg/L^80 μg/L.The linear correlative coefficient for arsenic was 0.9994.The quality of the results was proved by the recovery experiments（ranging from 92.4% to 109.6%）.The relative standard deviation was 2.5%（n=11） for arsenic in bag tea samples.The contents of arsenic in bag tea were in the range of 0.10 mg/kg^0.80 mg/kg.Conclusion： The findings indicate that the proposed method is simple,fast and accurate,which can meet the demand for determining arsenic in bag tea samples of health food.