A Highly Sensitive Impedimetric Metamitron Microsensor Based on All-Solid-State Membrane Using a New Ion-Pair Complex, [3,3′-Co(1,2-closo-C2B9H11)2]−[C10H11ON4]+

Proceedings

Baraket, Abdoullatif¹  Gallardo-Gonzalez, Juan²  Ayroud, Zakaria³  Hangouet, Marie⁴ 

[1] Author to whom correspondence should be addressed.;Centro Nacional de Microelectrónica (IMB-CSIC) Campus UAB, Bellaterra, 08193 Barcelona, Spain;Institut des Sciences Analytiques, Université de Lyon, UMR 5280, CNRS, Université Lyon 1, ENS Lyon-5, rue de la Doua, F-69100 Villeurbanne, France;Presented at the Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018

关键词: metamitron;    ion-pair complex;    microsensor;    metallocarboranes;    herbicides;    triazines;   

DOI  :  10.3390/proceedings2131093

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

An all-solid-state impedimetric microsensor based on impedimetric measurements for detecting the herbicide metamitron (MM) is reported in the present work. For this purpose, a novel metamitron ionophore has been prepared. It was based on the isolation of the metamitron monoprotonated form coupled to the metallocarborane anion, cobalt bis (dicarbollide), ([3,3′-Co(1,2-closo-C2B9H11)2]−) as an ion-pair complex of the type [3,3′-Co(1,2-closo-C2B9H11)2]−[C10H11ON4]+. Once the ion-pair complex was synthetized, it was incorporated to a PVC-type membrane including o-Nitrophenyloctylether (o-NPOE) as plasticizer. The membrane was then drop-cast on top of polypyrrole-modified gold working microelectrodes. A quick response of 30 s has been provided by the microsensor in the range of metamitron concentrations between 10−8 M and 10−4 M with a limit of detection of 10−8 M. Furthermore, it was highly selective toward metamitron, when compared to some possible interfering compounds as imazapic and carbetamide.

【 授权许可】

CC BY