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A flow injection potentiometric method for the rapid determination of paraquat in herbicide formulations and biological samples is described. It is based on the utilization of a flow-through potentiometric detector containing polyvinyl chloride-immobilised octamethylcyclotetrasiloxane, a lipophilic plasticizer (tetra-n-undecyl 3,3′,4,4′-benzophenone tetracarboxylate) and membrane additive potassium...
In the first part of this paper, the development of high-performance paraquat selective potentionmetric sensors based on octamethylcyclotetrasiloxane is described. In the fabrication of these sensors, the use of highly lipophilic PVC-based membrane components, namely, plasticizer and anionic sites, is emphasized. The electrochemical characteristics of such sensors were evaluated and compared with...
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