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目的采用氢化物发生-原子荧光光谱法测定生活饮用水中的汞。方法采用2%硝酸溶液作为载流代替原来的5%盐酸溶液,20 g/L的硼氢化钾溶液作为实验的还原剂。结果本方法适用于生活饮用水中汞的测定,回收率90.0%～100.5%,标准曲线r>0.995,检出限为0.033 8μg/L,相对标准偏差为1.24%。结论本方法方便、快速、准确,灵敏度高,能消除实验中的干扰因素,满足日常生活水质的检测要求。
Objective To determine mercury in drinking water by hydride generation - atomic fluorescence spectrometry. Methods 2% nitric acid solution was used as a carrier instead of the original 5% hydrochloric acid solution and 20 g / L potassium borohydride solution as the experimental reducing agent. Results The method was suitable for the determination of mercury in drinking water. The recovery rate was 90.0% ~ 100.5%. The standard curve r> 0.995, the detection limit was 0.033 8μg / L and the relative standard deviation was 1.24%. Conclusion The method is convenient, rapid, accurate and sensitive. It can eliminate the interference factors in the experiment and meet the testing requirements of daily living water quality.