Simultaneous determination of arsenic and mercury in human blood by microwave digestion-Atomic fluorescence spectroscopy,microwave digestion with 5mL 65%nitric acid,extraction with 2 mL 1:1 hydrochloric acid,and pre-reduction with 1 mL 5%thiourea + 5%ascorbic acid solution.The results showed that the detection limit was As 0.016 μg/L;HG 0.007 μg/L;RSD was As:4.41%-4.65%;Hg:1.41%-2.08%(n=11).The recoveries of arsenic and mercury were 99%-107%and 97%-101%,respectively.The method has the advantages of good stability,high precision and easy operation,and can be used for the simultaneous determination of arsenic and mercury in human blood.
关键词
微波消解/原子荧光光谱法/人体血液/砷和汞
Key words
microwave digestion/atomic fluorescence spectroscopy/human blood/arsenic and mercury
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