氢化物发生-原子荧光光谱法测定水中痕量锑的研究

Determination of Trace Antimony in Water by Hydride Generation-Atomic Fluorescence Spectrometry Method

目的建立在硝酸介质中用氢化物发生-原子荧光光谱法测定水中痕量锑的方法。方法选择最佳的仪器条件、酸度、硼氢化钾及还原剂浓度,对方法的检出限、线性范围、精密度、加标回收率等进行了考察。结果该方法线性范围为0~15.0μg/L。检出限为0.01μg/L,相对标准偏差为2.95%~4.38%,加标回收率为锑为96%~104%。结论该方法操作简便,灵敏度高,快速,便于推广,适用于水中痕量锑的测定。

Objective To establish a method for determination of trace antimony in water by Hydride - generation Atomic Fluorescence Spectrometry （HG -AFS） method in nitric acid medium. Methods Under optimal in- strument condition, acidity, concentration of potassium borohydride and thiourea - ascorbic acid, the limit, linear range, precision and the recovery of standard addition were determined and analyzed. Results The line- ar relationship of antimony was 0 - 15.0μg/L. The detection limit of antimony was 0. 01 μg/L. The relative standard deviation of antimony was 2. 95% -4.38%. The standard recovery rate of antimony was 96% - 104% respectively. Conclusion With characteristics of simple, sensitive and rapid, this method is worthy of promotion to for determination of trace antimony in water.