双道原子荧光光谱法同时测定饮用水中的砷和汞

Double-channel afs determination of arsenic and mercury in tap water

利用氢化物发生 原子荧光分析技术 ,对自来水样品中的砷、汞联合测定方法进行了有益的探索 .通过一系列条件实验 ,设定出了合理有效的水样前处理方法、仪器测定条件以及主要试剂的浓度 .砷和汞的相关系数分别为 0 .9995和 0 .9990 ,相对标准偏差分别为 4 .9%和 6 .8% ,最低检出限分别为 0 .2 3和 0 .0 5 μg/L .结果表明 ,该方法用于水样中汞。

The hydride generation atomic fluorescence spectrometric method was adopted for the determination of arsenic and mercury in tap water.Through a series of experiments, the method of pretreatment,the optimum conditions of determination and the concentration of reagents are tested.The following results are obtained for this method,relative coefficients:0.9995(for As),0.9990(for Hg),RSD:4.9%(for As),6.8%(for Hg),Detection limits:0.23 μ g /L(for As),0.05 μ g/ L(for Hg).It is proved that the proposed method is feasible and applicable.