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Corresponding Author

Xing_Yao ZHOU

Abstract

Thionine was bound onto a glutathione monolayer self_assembled on the surface of a gold electrode previously, the electrochemical characteristics of which were studied. It was found that dopamine had a quasi_reversible response and cathodic characterstics peak could be used to determine the concentration of dopamine in the range of 1.0~300 μmol·L -1 in the presence of a higher concentration of ascorbic acid.

Keywords

Glutathione, Thionine, Dopamine, Ascorbic acid, Monolayer

Publication Date

2002-08-28

Online Available Date

2002-08-28

Revised Date

2002-08-28

Received Date

2002-08-28

References

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[4] RuanChuanmin,YangRu,etal.Areagentlessamperometrichydrogenperoxidebiosensorbasedoncovalent lybindinghorseradishperoxidaseandthionineusingathiol_modifiedgoldelectrode[J].JElectroanalChem,1998,455:121.

[5] OhtaniM ,KuwabataS ,YoneyamaH .Electrochemicaloxidationofreducednicotinamidecoenzymesatauelectrodesmodifiedwithphenothiazinederivativemonolayers[J].JElectroanalChem,1997,422:45.

[6] XuJing_Juan,FangHuai_Qun,ChenHong_Yuan.Theelectrochemicalcharacteristicsofgoldelectrodemodi fiedbythioninecovalentlyboundtoself_assembledcysteaminemonolayeranditselectrocatalyticoxidationforascorbicAcid[J].Chem.J.ChineseUniversities,1997,18(5):706.

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