Pseudomonas putida Based Amperometric Biosensors for 2,4-D Detection
Articles > Article · 2008
Authors: Dilek ODACI, Mustafa Kemal SEZGINTUERK, Suna TİMUR, Nurdan PAZARLIOLU, Roberto PILLOTON, Erhan DİNÇKAYA, Azmi TELEFONCU
PREPARATIVE BIOCHEMISTRY & BIOTECHNOLOGY, Journal Indexed in SCI Expanded, International, 2008, vol 39, pp 11-19
DOI: 10.1080/10826060802589460
Summary
Amperometric biosensors using Pseudomonas putida cells as a bioelement were developed for 2,4-dichloro phenoxy acetic acid (2,4-D). After the adaptation process of Pseudomonas putida to 2,4-D, cells were immobilized onto the screen printed graphite electrodes (SPG) as well as Clark oxygen probe by gelatin and glutaraldehyde. Optimum pH, temperature, and stability of the biosensor were investigated. Substrate specificities for various phenolic compounds were also searched. In repeatability studies, variation coefficients and standard deviations for both type of systems were calculated; SPG and Clark electrodes were calculated and results are given as a comparison of two systems. Finally, the biosensors were applied to 2,4-D determination in a real herbicide sample.