土壤中总汞的原子荧光测定法

Determination of Total Mercury in Soil by Atomic Fluorescence Spectrophotometry

目的建立土壤中总汞的原子荧光测定方法。方法对方法中酸消解、原子荧光光度计测定条件等进行优化。结果在最佳条件下,方法的检出限为(0.25×10-3)mg/kg(按称取1g样品,定容至50ml计算),回收率为93.8%～103%,相对标准偏差为<5%。结论方法具有灵敏度高,检出限低,共存元素干扰少,线性范围宽,方法快速、简便等特点。

[ Objective] To establish a determining method of Mercury in soil by Atomic Fluorescence Spectrophotometry. [ Methods ] Acid digestion of this method, determination conditions of Atomic Fluorescence Spectrometer were optimized. [ Results ] Under optimum condition, the detection limit was （0.25 × 10^-3） mg/kg （calculation by 1 g sample to 50 ml constant volume）, the coefficient of recovery was 93.8% - 103%, relatively standard deviation was 〈 5 %. [ Conclusion ] This method has high sensitivity, low detection limit, less interference with the coexistence of elements, wide linear range, rapid method, simple, and so on.