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目的:研究几种砷化合物经过微波消解前后氢化物发生行为。方法:采用电感耦合等离子体质谱和原子荧光光谱分别测定微波消解前后砷化合物含量,并利用两种方法对部分海产品总砷含量进行测定。结果:经过微波消解后,电感耦合等离子体质谱测定几种砷化合物的回收率在95%~101%之间,和标准值一致;砷甜菜碱和砷胆碱在微波消解前后均没有氢化物行为发生;一甲基砷、二甲基砷和无机砷在微波消解前后均有氢化物行为发生,其中无机砷完全氢化物发生,一甲基砷氢化物发生效率分别为91.4%和95.1%,二甲基砷分别为34.5%和25.7%。结论:上述结果表明,部分砷化合物经过微波消解后没有氢化物发生行为,并且采用微波消解-原子荧光光谱测定海产品总砷结果可能较实际值偏低。
Objective: To study the hydride behavior of several arsenic compounds before and after microwave digestion. Methods: The contents of arsenic compounds in microwaves before and after microwave digestion were determined by inductively coupled plasma mass spectrometry and atomic fluorescence spectrometry respectively. The total arsenic contents of some marine products were determined by two methods. Results: After microwave digestion, the recovery of several arsenic compounds was between 95% and 101% by inductively coupled plasma mass spectrometry, consistent with the standard values. Both arsenobetaine and arsenic choline had no hydride behavior before and after microwave digestion Occurred both before and after microwave digestion. Among them, the complete hydrides of inorganic arsenic occurred, the efficiency of monomethylarsonate hydride generation was 91.4% and 95.1% respectively, Methyl arsenic was 34.5% and 25.7%, respectively. CONCLUSIONS: The above results show that no hydride generation occurs in some arsenic compounds after microwave digestion, and the total arsenic concentration in seafood may be lower than the actual value by microwave digestion-atomic fluorescence spectrometry.