Abstract
AbstractThe use of glassy carbon electrodes (GCEs) modified with multiwalled carbon nanotube (CNT) films for the continuous monitoring of 2,4‐dichlorophenol (2,4DCP) in flow systems has been examined. The performance of these modified electrodes was evaluated and compared to bare GCE by cyclic voltammetry experiments and by flow injection analysis (FIA) with amperometric detection monitoring the response of 2,4DCP and 1,4‐benzoquinone in 0.050 M phosphate buffer pH 7.0. The CNT‐modified electrodes provided lower overpotentials, higher sensitivity and much higher signal stability under a dynamic regime than bare GCEs. The application of GCEs modified with a layer of CNT dispersed in Nafion for controlling 2,4DCP impurity in 2,4‐dichlorophenoxyacetic acid illustrates the possibilities of such electrodes for the stable long‐term measurements demanded by industrial activities.
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