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

Sensors

Kyo-Il Kim¹  Hee-Young Kang¹  Jae-Chan Lee¹ 

[1] Department of Chemistry, Hannam University, Daejeon 305-811, Republic of Korea;

关键词: MWNT ion liquid electrode;    glycidyl methacrylate;    radiation-induced graft polymerization;    phenolics;    red wines;   

DOI  :  10.3390/s90906701

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2009 by the authors; licensee MDPI, Basel, Switzerland