China Biotechnology 2008;28(3):44-52

The Assembly of a Novel Enzyme Biosensor for Aflatoxin B1 Detection

Daling LIU ; Yi SHEN ; Jing ZHANG ; Dongsheng YAO

Keywords

Aflatoxin B1; Enzyme electrode; Multi-walled carbon nanotubes

Country

China

Language

Chinese

Abstract

A novel biosensor for aflatoxin B1 detecting has been reported. The biosensor electrode for AFB1 detecting was assembled by immobilized aflatoxin-oxidoreductase using open-ended multi-walled carbon nanotubes as matrix. Its linear range was between 0.16μM and 3.2μM. And if the specific anti-aflatoxin B1 antibody and aflatoxin oxidoreductase were both immobilized on the electrode with Multi-Walled carbon nanotubes, the detection limit of the modified electrode could be 16 nM with a 10 times improved sensitivity. The aflatoxin enzyme biosensor assembled this way strode one step forward its practical application.