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Simultaneous Polarographic Determination of Lead and Cadmium After Enrichment by Adsorption of PAN-Pb and PAN-Cd Complex on Activated Carbon

Dan Dezhong,Yu Jiangyan and Qin Feng(Department of Environmental Science and Engineering ,Sichuan Union University,Chengdu 610065)  
A preconcentration method based on the adsorption on activated carbon of the complex of Pb(Ⅱ) and Cd(Ⅱ) with PAN,and subsequent polarographic determination of trace amounts of Pb(Ⅱ) and Cd(Ⅱ) has been developed.The detection limit was found to be 8×10-4mg/L for Pb(Ⅱ) and 6×10-4mg/L for Cd(Ⅱ) in a supporting electrolyte of 3mol/L H_2SO_4 and 1mol/L KI.The method has been used successfully for the determination of Pb(Ⅱ) and Cd(Ⅱ) in environmental water samples.
【CateGory Index】: O614
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