Poly(brilliant green) and poly(thionine) modified carbon nanotube coated carbon film electrodes for glucose and uric acid biosensors

TALANTA

卷:130

Article

Emilia Ghica, M.¹  Brett, Christopher M. A.¹ 

[1] Univ Coimbra, Fac Ciencias & Tecnol, Dept Quim, P-3004535 Coimbra, Portugal

关键词: Poly(brilliant green);    Poly(thionine);    Carbon film electrodes;    Carbon nanotubes;    Glucose oxidase;    Uricase;   

DOI  :  10.1016/j.talanta.2014.06.068

来源: Elsevier

【 摘 要 】

Poly(brilliant green) (PBG) and poly(thionine) (PTH) films have been formed on carbon film electrodes (CFEs) modified with carbon nanotubes (CNT) by electropolymerisation using potential cycling. Voltammetric and electrochemical impedance characterisation were performed. Glucose oxidase and uricase, as model enzymes, were immobilised on top of PBG/CNT/CFE and PTH/CNT/CFE for glucose and uric acid (UA) biosensing. Amperometric determination of glucose and UA was carried out in phosphate buffer pH 7.0 at -20 and +0.30 V vs. SCE, respectively, and the results were compared with other similarly modified electrodes existing in the literature. An interference study and recovery measurements in natural samples were successfully performed, indicating these architectures to be good and promising biosensor platforms. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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