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A b s t r a c t

An online mercury preconcentration and determination system consisting of cold vapor atomic absorption spectrometry (CVAAS) coupled to a flow injection (FI) method was studied. The method was developed involving the determination of ng/L levels of mercury retained on the silver wool solid sorbent. Experimental conditions such as sample volume, flow rate, stability of the column and effect of foreign ions on the determination of trace amounts of mercury were optimized. The detection limit is 3 ng/L and dynamic range 10–250 ng/L of analysis requires only 50 mL of sample. The relative standard deviations (RSD) of the determinations are below 4%. The presence of common metal ions, such as K+, Na+, Cu2+, Pb2+, Fe3+, Ni2+ and Mn2+, does not interfere with the measurement of mercury by this method. The method was successfully applied to the determination of mercury in water and wastewater samples.


H. Zavvar Mousavi, Alireza Asghari, and Hamid Shirkhanloo


The financial support of this work by the Research Council of Semnan University is greatly acknowl edged.

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