Design of a macroalgae amperometric biosensor; application to the rapid monitoring of organophosphate insecticides in an agroecosystem - Archive ouverte HAL Access content directly
Journal Articles Chemosphere Year : 2014

Design of a macroalgae amperometric biosensor; application to the rapid monitoring of organophosphate insecticides in an agroecosystem

(1) , (1) , (1) , (1) , (1) , (1) , (2) , (3) , (4)
1
2
3
4

Abstract

The immobilization of enzymes onto transducer support is a mature technology and has been successfully implemented to improve biocatalytic processes for diverse applications. However, there exists still need to design more sophisticated and specialized strategies to enhance the functional properties of the biosensors. In this work, a biosensor platform based on innovative fabrication strategy was designed, and employed for the detection of organophosphate (OP) in natural waters. The biosensor was prepared by incorporating acetylcholinesterase enzyme (AChE) to the graphite paste modified with tetracyanoquinodimethane (TCNQ) mediator, along with the use of a macroalgae (Cladaphropsis membranous) as a functional immobilization support. The novel immobilization design resulted in a synergic effect, and led to enhanced stability and sensitivity of the biosensor. The designed biosensor was used to analyze methyl parathion OP insecticide in water samples collected from a demonstrably contaminated lake of São Luis Island, Maranhão, Northeast of Brazil. Water analysis revealed that the aquatic ecosystem was polluted by sub-ppm concentrations of the OP insecticide, and a good correlation was found between values obtained through biosensor and GC–MS techniques. Our results demonstrated that macroalgae-biosensor could be used as a low-cost and sensitive screening method to detect target analyte.
Not file

Dates and versions

hal-01174766 , version 1 (09-07-2015)

Identifiers

Cite

G.S. Nunes, J.A.P. Lins, F.G.S. Silva, L.C. Araujo, F.E.P.S. Silva, et al.. Design of a macroalgae amperometric biosensor; application to the rapid monitoring of organophosphate insecticides in an agroecosystem. Chemosphere, 2014, 111, pp.623-630. ⟨10.1016/j.chemosphere.2014.05.028⟩. ⟨hal-01174766⟩

Collections

UNIV-PERP
25 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More