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  • 08월 28일 16시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

Phenol biosensor based on ZnO-Nafion Composite film

등록일
2008년 8월 12일 12시 19분 23초
접수번호
1372
발표코드
32P113포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅳ>
발표형식
포스터
발표분야
분석화학
저자 및
공동저자
이중민
연세대학교 화학과, Korea

A highly sensitive and stable amperometric tyrosinase biosensor has been developed based on mesoporous composite films of sol-gel-derived ZnO and perfluorosulfonated ionomer (Nafion). Tyrosinase was immobilized within a thin film of ZnO - Nafion composite film coated on a glassy carbon electrode. Phenolic compounds were determined by the direct reduction of biocatalytically liberated quinone species at -100 mV versus Ag/AgCl (3 M NaCl) without a mediator. The present tyrosinase biosensor showed good analytical performances in terms of limit of detection(LOD), sensitivity, and linear range compared to those obtained with other biosensors based on different sol-gel matrices. The present biosensor responds linearly to phenol from 2.99 x 10-9 M to 1.87 x 105 M with an excellent sensitivity of 1113.54 mA/M and a detection limit of 8.24 x 10-10 M (S/N=3).


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