Combination of ultrasound-assisted ionic liquid dispersive liquid-phase microextraction and high performance liquid chromatography for the sensitive determination of benzoylureas pesticides in environmental water samples
This paper describes a new method for rapid and sensitive determination of diflubenzuron, flufenoxuron, triflumuron and chlorfluazuron in water samples by ultrasound-assisted ionic liquid dispersive liquid-phase microextraction in combination with HPLC. Ionic liquid 1-hexyl-3-methylimidazolium hexaf...
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Published in | Journal of separation science Vol. 33; no. 23-24; pp. 3734 - 3740 |
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Main Authors | , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley-VCH Verlag
01.12.2010
WILEY-VCH Verlag WILEY‐VCH Verlag Wiley |
Subjects | |
Online Access | Get full text |
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Summary: | This paper describes a new method for rapid and sensitive determination of diflubenzuron, flufenoxuron, triflumuron and chlorfluazuron in water samples by ultrasound-assisted ionic liquid dispersive liquid-phase microextraction in combination with HPLC. Ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate ([C₆MIM][PF₆]) was used as the extraction solvent for the enrichment of four benzoylurea (BU) pesticides. Factors such as volume of [C₆MIM][PF₆], sonication time, sample pH, extraction time, centrifuging time and salting-out effect were systematically investigated. Under the optimum conditions, an excellent linear relationship was achieved in the range of 1.0-100 μg/L. The detection limits varied from 0.21 to 0.45 μg/L and the precision of the method was below 6.9% (RSD, n=6). The proposed method was successfully applied for the determination of these BU pesticides in water samples and excellent spiked recoveries were achieved. All these results demonstrated that this procedure provided a new simple, rapid, easy to operate, efficient and sensitive method for the analysis of BU pesticides in aqueous samples. |
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Bibliography: | http://dx.doi.org/10.1002/jssc.201000443 ark:/67375/WNG-X74FB9NS-8 Personal Innovation Foundation of Universities in Henan Province - No. [2005]126 istex:0D46C4D40FCF8EF37AE53F5E90EFE05DCD757465 National Natural Science Foundation of China - No. 20877022 Natural Science Foundation of Henan Province - No. 092300410126 ArticleID:JSSC201000443 ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 1615-9306 1615-9314 1615-9314 |
DOI: | 10.1002/jssc.201000443 |