Article ID Journal Published Year Pages File Type
1167210 Analytica Chimica Acta 2011 6 Pages PDF
Abstract

A new protocol is proposed for magnetic loading and sensitive electrochemical detection of phenol via the tyrosinase cross-linked mesoporous magnetic core/shell microspheres. The mesoporous magnetic microspheres, characterized by transmission electron microscopy, N2 adsorption/desorption isotherms, and magnetic curve displays high capacity for enzyme immobilization and strong magnetism to adhere to the magnetic electrode surface without any additional adhesive reagent. The biosensor exhibits a wide linear response to phenol ranging from 1.0 × 10−9 to 1.0 × 10−5 M, a high sensitivity of 78 μA mM−1, a low detection limit of 1 nM, and a fast response rate (less than 5 s). The proposed method is simple, rapid, inexpensive and convenient in electrode renewal, which is recommended as a promising experimental platform for wider applications in biosensing.

Related Topics
Physical Sciences and Engineering Chemistry Analytical Chemistry
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