同时测定水中砷和锑的氢化物发生-原子荧光光谱法

目的建立双道原子荧光光度计同时测定饮用水中砷和锑的方法,以提高工作效率。方法选择最佳的仪器条件,进行样品处理方法及酸度、硼氢化钾浓度、检出限、线性范围、精密度、加标回收率等研究。结果该方法线性关系:砷为0～80μg/L,锑为0～40μg/L。检出限:砷为0.087μg/L,锑为0.19μg/L。相对标准偏差:砷为1.93%～2.55%;锑为1.97%～3.02%。平均加标回收率:砷为95.7%;锑为96.5%。结论该方法操作简便,灵敏度高,快速,便于推广,适用于水中砷和锑的同时测定。

Simultaneous determination of arsenic and antimony in water by hydride generation-atomic fluorescence spectrometry

[Objective]To establish the method for simultaneous determination of arsenic and antimony in drinking water by double channel atomic fluorescence spectrometer,improve work efficiency.[Methods]Choosing optimal instrument condition,the sample treatment method,acidity,concentration of potassium borohydride,detection limit,linear range,precision and the recovery of standard addition were studied.[Results]The linear relationship of arsenic and antimony was 0-80 μg/L and 0-40 μg/L respectively.The detection limit of arsenic and antimony was 0.087 μg/L and 0.19 μg/L respectively.The relative standard deviation of arsenic and antimony was 1.93%-2.55% and 1.97%-3.02% respectively.The average recovery of standard addition of arsenic and antimony was 95.7% and 96.5% respectively.[Conclusion]This method has the advantages of simple operation and high sensitivity,it is rapid and easy to spread,which is suitable for simultaneous determination of arsenic and antimony in water.