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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。
Objective To establish a dual-channel atomic fluorescence spectrophotometer simultaneous determination of arsenic and antimony in drinking water in order to improve work efficiency. Methods The best instrument conditions were selected for the study of sample processing methods and acidity, potassium borohydride concentration, detection limit, linear range, precision, recovery of standard addition. Results The linear relationship between the method: arsenic 0 ~ 80μg / L, antimony is 0 ~ 40μg / L. The detection limit: arsenic 0.087μg / L, antimony 0.19μg / L. Relative standard deviation: arsenic was 1.93% ~ 2.55%; antimony was 1.97% ~ 3.02%. Average spike recoveries: 95.7% for arsenic and 96.5% for antimony. Conclusion The method is simple, sensitive, rapid, and easy to popularize. It is suitable for the simultaneous determination of arsenic and antimony in water.