期刊
JOURNAL OF SEPARATION SCIENCE
卷 32, 期 22, 页码 3945-3950出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.200900444
关键词
Chlorbenzuron; Chlorotoluron; Diethofencarb; 1-Hexyl-3-methylimidazolium hexafluorophosphate; Temperature-controlled ionic liquid-dispersive liquid-phase microextraction
资金
- National Natural Science Foundation of China [020877022]
- High-Tech Research & Development Planning (863 Plan) of P.R. China [2006AA06Z424]
- Personal Innovation Foundation of Universities in Henan Province [[2005]126]
- Natural Science Foundation of Henan Province [092300410126]
- Henan Normal University [2006PL06]
- Henan Key Laboratory for environmental pollution control
This article describes a new, rapid and sensitive method for the determination of chlorotoluron, diethofencarb and chlorbenzuron from water samples with temperature-controlled ionic liquid-dispersive liquid-phase microextraction. In the preconcentration procedure, ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate [C6MIM] [PF6] was employed as the extraction solvent. The parameters, such as volume Of [C6MIM] [PF6], sample pH, extraction time, centrifuging time, temperature and salting-out effect, were investigated in detail. Under the optimal extraction conditions, it has been found that three analytes had excellent LODs (S/N = 3) in the range of 0.04-0.43 mu g/L. The RSDs (n = 6) were in the range of 1.3-4.7%. The proposed method was evaluated with lake water, tap water and melted snow water samples. The experimental results indicated that the proposed method had excellent prospect and would be widely used in the future.
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