Preparation of Cu~(2+) Selective Electrode by Silica Matrix Molecular Imprinting Technology

LIU Ya-qiang,LIU Yan,HUANG Xi-chao (Institute of Chemical Sensors,Weinan Teachers' College,Weinan 714000,Shaanxi,China)  

By using 3-(2-aminoethylamino)propyltrimethoxysilane as functional molecule,and copper ion as template,copper ion selective electrode is prepared.The process includes the combination of two technologies of sol-gel and molecular imprinting.The mechanism of responding of the electrode is also discussed.Its linear responding scope is 5.00×10-2～3.98×10-6 mol · L-1,with the slope of 31.5 mV/pC to copper ion,and the detect limiting is 1.00×10-6 mol · L-1.Besides,the electrode shows better selectivity,reproducibility and stability.

【Key Words】： molecular imprinting sol-gel copper ion ion-selective electrode
【Fund】： 陕西省教育厅专项资助项目(07JK240);; 渭南师范学院专项资助项目(07XKZ033)
【CateGory Index】： O657.15

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