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Issue 3, 2011
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Sensitive determination of phenols from water samples by temperature-controlled ionic liquid dispersive liquid-phase microextraction

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Abstract

This paper established a new determination method for phenols using temperature-controlled ionic liquid dispersive liquid-phase microextraction prior to high-performance liquid chromatography. In this experiment, 1-octyl-3-methylimidazolium hexafluorophosphate ([C8MIM][PF6]) was employed as the extraction solvent for the enrichment of 2-chlorophenol, 2-naphthol, 2,4-dinitrophenol, and 2,4-dichlorophenol. Parameters that may affect the extraction efficiency including the volume of [C8MIM][PF6], dissoluble temperature, extraction time, sample pH, amount of ethanol, centrifugation time and salting-out effect have been investigated in detail. Under the optimal conditions, they have good linear relationships over the concentration range of 1.0-100 ng mL−1 for 2-chlorophenol, 2-naphthol, 2,4-dinitrophenol, and 1.5-150 ng mL−1 for 2,4-dichlorophenol, and excellent detection sensitivity with limits of detection (LOD, S/N = 3) in the range of 0.27–0.68 μg L−1. Intra day and inter day precisions of the proposed method (RSDs, n = 6) were 2.1–3.7% and 5.1–7.2%, respectively. The proposed method has been successfully applied to analyze real water samples spiked with two different concentrations and good spiked recoveries over the range of 85.8–117.0% were obtained. These results indicated that the proposed method would be competitive in the analysis of phenols in the future.

Graphical abstract: Sensitive determination of phenols from water samples by temperature-controlled ionic liquid dispersive liquid-phase microextraction

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Publication details

The article was received on 15 Oct 2010, accepted on 06 Jan 2011 and first published on 03 Feb 2011


Article type: Paper
DOI: 10.1039/C0AY00619J
Citation: Anal. Methods, 2011,3, 653-658
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    Sensitive determination of phenols from water samples by temperature-controlled ionic liquid dispersive liquid-phase microextraction

    Q. Zhou, Y. Gao, J. Xiao and G. Xie, Anal. Methods, 2011, 3, 653
    DOI: 10.1039/C0AY00619J

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