Magnetic enzymatic platform for organophosphate pesticide detection using boron-doped diamond electrodes

Flavio Pino, Tribidasari A. Ivandini, Kazuya Nakata, Akira Fujishima, Arben Merkoçi, Yasuaki Einaga

    Research output: Contribution to journalArticleResearchpeer-review

    8 Citations (Scopus)

    Abstract

    © 2015 The Japan Society for Analytical Chemistry. A simple and reliable enzymatic system for organophosporus pesticide detection was successfully developed, by exploiting the synergy between the magnetic beads collection capacity and the outstanding electrochemistry property of boron-doped diamond electrodes. The determination of an organophosphate pesticide, chlorpyrifos (CPF), was performed based on the inhibition system of the enzyme acetylcholinesterase bonded to magnetic beads through a biotin-streptavidin complex system. A better sensitivity was found for a system with magnetic beads in the concentration range of 10 -9 to 10 -5 M. The estimated limits of detection based on IC 10 (10% acetylcholinesterase (AChE) inhibition) have been detected and optimized to be 5.7 × 10 -10 M CPF. Spiked samples of water of Yokohama (Japan) have been measured to validate the efficiency of the enzymatic system. The results suggested that the use of magnetic beads to immobilize biomolecules or biosensing agents is suitable to maintain the superiority of BDD electrodes.
    Original languageEnglish
    Pages (from-to)1061-1068
    JournalAnalytical Sciences
    Volume31
    Issue number10
    DOIs
    Publication statusPublished - 1 Jan 2015

    Keywords

    • Boron-doped diamond electrode
    • Inhibition based detection system
    • Magnetic pre-concentration platform
    • Organophosphate

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