【摘要】 天然水体中汞的含量仅为ng／L级,不仅难以测出,而且在测定过程中极易受到干扰;利用两次金汞齐的预富集方法与原子荧光法结合的技术,作者建立了天然水体超痕量不同形态汞的准确分析方法;该方法的检出限达到了0.02ng／L,实验平均回收率为101%;该方法也适用于其它低汞含量水样(包括稀释后的污水及化工废水)中汞的形态分析。更多还原

【Abstract】 Total mercury concentrations in natural waters are only in the range of ng/L,and interference and contamination make the direct determination of mercury in water samples difficult.In this paper,a method of two-stage amalgamation pre_concentration coupled with atomic fluorescence spectrometry(AFS)is proposed for the determination of ultra trace levels of mercury species in natural waters.Its detection limit is0.02ng/L,and its average recovery rate is101%.This method is also applicable to the speciation analysis of mercury in other types of water samples.更多还原