Electrocatalytic oxidation and determination of insulin at CNT-nickel-cobalt oxide modified electrode

被引：78

作者：

Arvinte, Adina ^{[1
]}

Westermann, A. Caroline ^{[1
]}

Sesay, Adama Marie ^{[1
]}

Virtanen, Vesa ^{[1
]}

机构：

[1] Univ Oulu, Biotechnol Lab, Kajaani Univ Consortium, Sotkamo 88600, Kainuu, Finland

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 150卷 / 02期

关键词：

Nickel-cobalt oxide; CNT; Insulin oxidation; OXYGEN EVOLUTION; HYDROXIDE ELECTRODE; CARBON NANOTUBES; ELECTROCHEMICAL CAPACITORS; AMPEROMETRIC DETERMINATION; COMPOSITE ELECTRODES; PHYSIOLOGICAL PH; SPRAY-PYROLYSIS; METAL-OXIDES; THIN-FILMS;

D O I：

10.1016/j.snb.2010.08.004

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

CNT-nickel-cobalt oxide/Nation composites were prepared by combining the nickel-cobalt oxide powder with CNT directly into the Nation solution used as a binder and deposited on screen-printed electrodes substrates Their electrochemical behaviour was investigated by means of cyclic voltammetry and amperometry techniques in NaOH and phosphate buffer solutions The electrocatalytic activity of these sensors was evaluated in terms of sensitivity detection limit and stability towards insulin detection CNT-nickel-cobalt oxide/Nation electrodes enable the oxidative detection of insulin in aqueous solution at physiological pH with a good sensitivity (22 57 mu A x mg(-1) x mL(-1)) An electrochemical activation step of the sensor in alkaline solution has been shown to be necessary for a three times more sensitive response of CNT-nickel-cobalt oxide-composite electrode toward insulin detection (c) 2010 Elsevier BV All rights reserved

引用

页码：756 / 763

页数：8

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[1] SOME EFFECTS OF THE ADDITION OF COBALT TO THE NICKEL-HYDROXIDE ELECTRODE [J].