4.5 Article

Design of a multiwalled carbon nanotube-Nafion-cysteamine modified tyrosinase biosensor and its adaptation of dopamine determination

期刊

ANALYTICAL BIOCHEMISTRY
卷 444, 期 -, 页码 8-15

出版社

ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ab.2013.09.019

关键词

Multiwalled carbon nanotube; Nafion; Cysteamine; Tyrosinase; Dopamine

资金

  1. Ege University Research Fund [12 FEN 027]

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In this work, a multiwalled carbon nanotube (MWCNT)-Nafion-cysteamine (CA) modified tyrosinase biosensor brings a new and original perspective to biosensor technology intended for the development of dopamine determination. Dopamine measurements were done at 0.2 V with the amperometric method by the developed biosensor system. In addition, in this study dopamine determination was carried out by using the differential pulse voltammetry method between potentials of 0.4 and -0.15 V. In the optimization studies of the biosensor, some parameters such as optimal pH, optimal temperature, optimal enzyme amount, and effect of MWCNT concentration were investigated. Afterward, in the characterization studies, some parameters such as linearity and reproducibility were determined. In the reproducibility experiment, an average value of 1.026 mu M, a standard deviation of +/- 0.03975, and a coefficient of variation of 3.8% were determined for a 1-mu M dopamine concentration (n = 15). Determination of dopamine was carried out in drug samples by the developed biosensor. (C) 2013 Elsevier Inc. All rights reserved.

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