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Issue 102, 2016, Issue in Progress
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Electrochemical determination of 2,4-dichlorophenol at β-cyclodextrin functionalized ionic liquid modified chemical sensor: voltammetric and amperometric studies

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Abstract

A highly effective approach was developed for the specific detection of 2,4-dichlorophenol (2,4-DCP) in real samples, based on a cyclodextrin functionalized ionic liquid modified carbon paste electrode (β-CD-BIMOTs/CPE). First, systematic optimization procedures were carried out for β-CD-BIMOTs/CPE by cyclic voltammetry (CV) and chrono-amperometry methods. Second, the optimized methods were applied for the determination of 2,4-DCP in environmental samples. A large increase in the peak currents was observed in CV and chrono-amperometry of 2,4-DCP when using β-CD-BIMOTs/CPE compared to native cyclodextrin modified carbon paste electrode (β-CD/CPE) and bare carbon paste electrode (CPE). A comparison of voltammetric behavior between CPE, β-CD/CPE and β-CD-BIMOTs/CPE indicated that the combination of ionic liquid and cyclodextrin in the composition of the carbon paste significantly improved the conductivity and compatibility of the sensor. The introduction of β-CD-BIMOTs as a modifier results in clearly enhanced sensitivity and selectivity towards 2,4-DCP over a wide concentration range of 4 μmol L−1 to 100 μmol L−1, with a detection limit of 1.2 μmol L−1. The interferences from foreign substances in the peak current response were also studied and caused only minor changes in the signals (<4.6%). Good repeatability was achieved because of the stability of the modified electrode. The proposed method was applied to the determination of 2,4-DCP in leachates from landfill, mineral water and lake water with recoveries of (85.46–117.68%), (98.72–107.91%) and (89.25–107.46%), respectively.

Graphical abstract: Electrochemical determination of 2,4-dichlorophenol at β-cyclodextrin functionalized ionic liquid modified chemical sensor: voltammetric and amperometric studies

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Publication details

The article was received on 05 Aug 2016, accepted on 01 Oct 2016 and first published on 03 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA19816C
Citation: RSC Adv., 2016,6, 100186-100194
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    Electrochemical determination of 2,4-dichlorophenol at β-cyclodextrin functionalized ionic liquid modified chemical sensor: voltammetric and amperometric studies

    F. L. Mohd Rasdi, S. Mohamad, N. S. Abdul Manan and H. R. Nodeh, RSC Adv., 2016, 6, 100186
    DOI: 10.1039/C6RA19816C

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