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尿样经过微波消解后,其中的汞被氧化为离子状态,利用冷原子吸收测汞仪对样品进行测定。汞浓度在0～3.00μg/L的范围内具有较好的线性,相关系数达到0.999 9,方法检出限为0.016μg/L,且对国家一级标准物质贻贝(GBW08571)的验证结果与标准值吻合,回收率为91%～106%,样品测定相对标准偏差为2.7%。微波消解-冷原子吸收法灵敏度高,操作简单快捷,结果可靠,适合于测定尿中的痕量汞。
After digestion of the urine sample by microwave digestion, the mercury in the sample is oxidized to the ionic state, and the sample is measured by a cold atomic absorption mercury meter. The concentration of mercury in the range of 0 ~ 3.00μg / L has a good linearity, the correlation coefficient of 0.999 9, the detection limit of the method is 0.016μg / L, and the verification results of the national standard mussel (GBW08571) The standard values are consistent, the recoveries are 91% -106%, and the relative standard deviations of the samples are 2.7%. Microwave digestion - cold atomic absorption method with high sensitivity, simple and quick, reliable results, suitable for the determination of trace mercury in urine.