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Sensors 2009, 9(9), 6701-6714; doi:10.3390/s90906701

Fabrication of a Multi-Walled Nanotube (MWNT) Ionic Liquid Electrode and Its Application for Sensing Phenolics in Red Wines

Department of Chemistry, Hannam University, Daejeon 305-811, Republic of Korea;
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Received: 16 June 2009 / Revised: 14 July 2009 / Accepted: 18 August 2009 / Published: 26 August 2009
(This article belongs to the Section Chemical Sensors)
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Abstract

A multi-walled nanotube (MWNT) ionic liquid was prepared by the immobilization of 1-butylimidazole bromide onto an epoxy group on a poly(glycidyl methacrylate)-grafted MWNT, which was synthesized by radiation-induced graft polymerization of glycidyl methacrylate onto MWNT in an aqueous solution. Subsequently, a MWNT ionic liquid electrode was fabricated by hand-casting MWNT ionic liquid, tyrosinase, and chitosan solution as a binder on indium tin oxide (ITO) glass. The sensing ranges of the MWNT ionic liquid electrode with immobilized tyrosinase was in the range of 0.01-0.08 mM in a phosphate buffer solution. The optimal conditions such as pH, temperature, and effects of different phenolic compounds were determined. The total phenolic compounds of three commercial red wines were also determined on the tyrosinase-immobilized biosensor. View Full-Text
Keywords: MWNT ion liquid electrode; glycidyl methacrylate; radiation-induced graft polymerization; phenolics; red wines MWNT ion liquid electrode; glycidyl methacrylate; radiation-induced graft polymerization; phenolics; red wines
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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MDPI and ACS Style

Kim, K.-I.; Kang, H.-Y.; Lee, J.-C.; Choi, S.-H. Fabrication of a Multi-Walled Nanotube (MWNT) Ionic Liquid Electrode and Its Application for Sensing Phenolics in Red Wines. Sensors 2009, 9, 6701-6714.

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