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《Journal of Instrumental Analysis》 2011-07
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Preparation of an Ion Imprinted Fluorescent Sensor for Selectivity Determination of Cadmium in Aqueous Media

MU Huai-yan,GAO Yun-ling,FU Kun,YAO Ke-jian(State Key Laboratory Breeding Base of Green Chemistry Synthesis Technology,College of Chemical Engineering and Materials Science,Zhejiang University of Technology,Hangzhou 310014,China)  
An optical approach was developed for the detection of Cd2+ based on ion imprinted polymer membrances as sensing receptors.The polymer was synthesized with cadmium ions as a template and 2-naphthyl acrylate as both the fluorescence tag and a complex-forming agent.The free radical polymerization was performed within PVDF films and was initiated by 2,2′-azobisisobutyronitrile at 65 ℃ in dimethyl sulfoxide.The polymer showed a high selectivity for cadmium ions.The calibration curve was linear over the Cd2+ concentration range of 1-9 μmol/L with a detection limit of 5.5×10-7 mol/L.Compared with that by the ICP-MS method,the results by this method had no obvisous difference.The RSDs(n=10) of the polymer for Cd2+ was 2.3%,and the recoveries for Cd2+ in spiked river water were in the range of 97%-100%.
【Fund】: 国家自然科学基金资助项目(20807037)
【CateGory Index】: O657.3;O614.242
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