快速消解-石墨炉原子吸收光谱法测定食品中砷含量

目的 建立快速消解-石墨炉原子吸收光谱法测定食品中砷含量的方法。方法 采用快速消解法消解3类食品，用石墨炉原子吸收光谱法测定砷的含量。结果 本实验测定砷的方法检出限和定量限分别为0.051 mg/kg和0.170 mg/kg。与微波消解-原子荧光法测定结果相比，两种方法测定大米和茶叶的绝对差值占算数平均值分别为7.2%、7.6%，两种方法测定奶粉中砷的结果均为0 mg/kg。快速消解-石墨炉原子吸收光谱法的回收率在83.1%~94.4%。结论 本实验建立的快速消解-原子吸收光谱法测定食品中砷的检测方法准确、可靠，适用于食品中砷含量的检测。

Determination of arsenic in food by rapid digestion-graphite furnace atomic absorption spectrometry

Objective To establish a method for the determination of arsenic in food by rapid digestion-graphite furnace atomic absorption spectrometry. Methods Three kinds of food were digested by rapid digestion, and the content of arsenic was determined by graphite furnace atomic absorption spectrometry. Results The limit of detection and quantification of this method for arsenic determination were 0.051 mg/kg and 0.170 mg/kg, respectively. Compared with the traditional microwave digestion-atomic fluorescence method, the absolute difference between the two methods for measuring rice and tea were 7.2% and 7.6%, respectively. The results of arsenic determination in milk powder by the two methods were 0. The recoveries of the rapid digestion-graphite furnace atomic absorption spectrometry were 83.1%?94.4%. Conclusion The rapid digestion-atomic absorption spectrometry method for the determination of arsenic in foods established by this experiment is accurate and reliable, and is suitable for the detection of arsenic in foods.