Preparation of an Ion Imprinted Fluorescent Sensor for Selectivity Determination of Cadmium in Aqueous Media
View Full Text    Download reader
KeyWord:metal ion imprinted polymer  surface molecular imprinted technique  fluorescence sensor  cadmium ion  2-naphthyl acrylate
牟怀燕,高云玲,付坤,姚克俭 浙江工业大学化学工程与材料学院绿色合成技术国家重点实验室培育基地
Hits: 2444
Download times: 876
      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%.