Laccase immobilization in redox active layered double hydroxides: A reagentless amperometric biosensor.

This paper describes a new system for amperometric detn. of dissolved oxygen and its application for the detection of anionic toxic substances, which are known as enzyme inhibitors. This biosensor is based on the co-immobilization of laccase from Trametes versicolor and a redox active layered double hydroxide [Zn-Cr-ABTS] on a glassy carbon electrode. The electrochem. transduction step corresponds to the electrocatalytic redn. of O2 at 0.2 V by laccase as catalyst and 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) as mediator. Such device provides a fast and a sensitive response for dissolved oxygen detn. between 6 × 10-8 and 4 × 10-6 M and very low detection limits for azide (5.5 nM), fluoride (6.9 nM) and cyanide (6.2 nM). [on SciFinder(R)]

Références

Titre
Laccase immobilization in redox active layered double hydroxides: A reagentless amperometric biosensor.
Type de publication
Article de revue
Année de publication
2007
Revue
Biosens. Bioelectron.
Volume
22
Pagination
1733–1738
ISSN
0956-5663
Soumis le 12 avril 2018