原子荧光光谱法同时测定饮用水中的砷和硒

目的：采用氢化物发生-原子荧光光谱法测定饮用水中的砷和硒。方法：用硝酸、高氯酸混合溶液消解水样,在5%盐酸介质中,加入硫脲-抗坏血酸混合试剂,以20g/L NaBH4溶液为还原剂,测定砷、硒荧光强度。结果：在最佳实验条件下,检出限砷为0.526μg/L,硒为0.452μg/L。回收率砷为94.8%～100.3%;硒为95.1%～99.0%。结论：此方法简便,快速,准确。

Simultaneous determination of arsenic and selenium in drinking water by atomic fluorescence sepectrometry

Objective：The hydride generation atomic fluorescence spectrometric method was adopted for the determination of arsenica and selenium in drinking water.Methods：The water sample was treated by HNO3 and HClO4,in the medium of 5% HCl,to enter for Thiourea and L-Ascorbic acld,to determine the fluorescent light strength by the reducer of 20% NaBH4.Results：In the best conditions of the experimentation,the detection limit,arsenic was 0.526 μg/L and selenium was 0.452 μg/L.Recovery rate of the method was 94.8%～100.3% for arsenic and 95.1%～99.0% for Selenium.Conclusion：This method is simple,fast and accurate.