Determination of trace inorganic and organic mercury in pond water by hydride-generation atomic fluorescence spectrometry combined with on-line flow injection technique

The method for determination of organic and inorganic mercury in pond water was proposed. Organic mercury in pond water was quickly broken down and transferred into inorganic mercury in acid medium with bromate bromide reagent, and the total of mercury in water was detected by hydride generation atomic fluorescence spectrometry combined with on line flow injection technique. After subtracting the content of inorganic mercury, the content of organic mercury was known. The detection limit and relative standard deviation of the method are 0.19 ng/mL and 4.2% respectively. An application of the proposed method to pond water is described. The recovery of standard solution were 95%~105%.