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Issue 8, 2011
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Simultaneous analysis of phthalate esters and pyrethroid insecticides in water samples by temperature-controlled ionic liquid dispersive liquid-phase microextraction combined with high-performance liquid chromatography

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Abstract

A simple, rapid and efficient method is described for the simultaneous pre-concentration and determination of phthalate esters and pyrethroid insecticides in water samples by temperature controlled ionic liquid dispersive liquid phase microextraction in combination with high performance liquid chromatography. In this procedure, only ionic liquid 1-octyl-3-methylimidazolium hexafluorophosphate [C8MIM][PF6] was used for the enrichment. The proposed method successfully overcomes the disadvantages of conventional single drop liquid phase microextraction and dispersive liquid-liquid microextraction such as the instability of the suspending drop and the use of toxic solvents, and requires a smaller extraction volume. Factors such as volume of [C8MIM][PF6], sample pH, extraction time, centrifugation time, and temperature and salting-out effect were systematically investigated and optimized. The detection limits obtained for phthalate esters and pyrethroid insecticides were in the range of 0.23–0.47 μg L−1 and the precisions were in the range of 2.2–5.9% (n = 6). Real water samples were used for validating the proposed method and satisfactory results were achieved.

Graphical abstract: Simultaneous analysis of phthalate esters and pyrethroid insecticides in water samples by temperature-controlled ionic liquid dispersive liquid-phase microextraction combined with high-performance liquid chromatography

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Publication details

The article was received on 11 Mar 2011, accepted on 26 May 2011 and first published on 18 Jul 2011


Article type: Paper
DOI: 10.1039/C1AY05137G
Citation: Anal. Methods, 2011,3, 1815-1820
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    Simultaneous analysis of phthalate esters and pyrethroid insecticides in water samples by temperature-controlled ionic liquid dispersive liquid-phase microextraction combined with high-performance liquid chromatography

    Q. Zhou, X. Zhang and G. Xie, Anal. Methods, 2011, 3, 1815
    DOI: 10.1039/C1AY05137G

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