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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 化學工程學系所 > 依資料類型分類 > 期刊論文 >  Amperometric biosensors based on multiwalled carbon nanotube-Nafion-tyrosinase nanobiocomposites for the determination of phenolic compounds

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/129280

標題: Amperometric biosensors based on multiwalled carbon nanotube-Nafion-tyrosinase nanobiocomposites for the determination of phenolic compounds
作者: Tsai, Y.C.;Chiu, C.C.
蔡毓楨
關鍵字: biosensor;amperometry;multiwalled carbon nanotubes;tyrosinase;nation;electrochemical biosensors;composite film;electrodes;construction;immobilization;extraction;chitosan;glucose;phase
日期: 2007
Issue Date: 2012-12-07 15:24:54 (UTC+8)
關連: Sensors and Actuators B-Chemical, Volume 125, Issue 1, Page(s) 10-16.
摘要: Amperometric biosensors for the determination of phenolic compounds (phenol, o-cresol, p-cresol, m-cresol, catechol, dopamine, and ephinephrine) have been constructed. It comprises a multiwalled carbon nanotube (MWNTs) conduit, a Nation backbone, and a tyrosinase function. The modification of glassy carbon electrode is made by a simple solution-evaporation method. The resulting multiwalled carbon nanotube-Nafion-tyrosinase (MWNT-Nafion-Tyr) nanobiocomposite film modified electrode is inexpensive, reliable, and easy to use. The homogeneity of the MWNT-Nafion-Tyr nanobiocomposite films was characterized by atomic force microscopy (AFM). The measurement of phenolic compounds is based on the signal produced by the electrochemical reduction of o-quinones, the product of the enzymatic reaction. Optimization studies were performed in stirred solution and the magnitude of response currents were found to be dependent on applied potential and enzyme loading. The optimized biosensor for phenol determination displayed a sensitivity of 303 mu A mM(-1) and a response time of less than 8 s. (c) 2007 Elsevier B.V. All rights reserved.
Relation: Sensors and Actuators B-Chemical
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 蔡毓楨
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