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《Journal of Transcluction Technology》 2003-04
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Glutaraldehyde Modified Gold Electrode for Subsequent Histidine Attachment and Determination of Copper

LI Chang-an+1, GE Cun-wang+{1,2}, LIU Zhan-hui+1, ZHANG Hai-qian+1, GU Ning+11. National Key Laboratory of Molecular and Biomolecular Electronics, Southeast University, Nanjing 210096, China;2. Research Center for Nano-scale Science and Technology, Southeast University, Nanjing 210096, China  
A new chemically modified gold electrode was prepared by Glutaralhehyde modified electrode for subsequent histidine attachment. A new approach was developed for sensitive and selective determination of copper by the electrode. A complex of copper with the modifier was formed and accumulated on surface of the electrode while immersed the electrode into a copper-containing solution. In a NaH 2PO 4-Na 2HPO 4buffer solution (pH6.8), the electrode has good electro activity. While adding copper,the current increase and the potential remains same. The value of peak current is linear with the copper concentration in ranges 1×10 -12~1.8×10 -11 mol/L and 5×10 -7~2.1×10 -5 mol/L. The detection limits is 0.5 pmol/L and an indirect mechanism of determination is proposed.
【CateGory Index】: O657.1
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