Journal
JOURNAL OF SEPARATION SCIENCE
Volume 40, Issue 23, Pages 4563-4570Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201700890
Keywords
benzoylureas; deep eutectic solvents; dispersive liquid-liquid microextraction; high-performance liquid chromatography; solidification
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Funding
- National Natural Science Foundation of China [21277172, 21507159]
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We present a novel dispersive liquid-liquid microextraction method based on the solidification of deep eutectic solvent coupled with high-performance liquid chromatography with a variable-wavelength detection for the detection of five benzoylureas in real water samples. In this work, a green solvent consisting of 1-octyl-3-methylimidazolium chloride and 1-dodecanol was used as an extraction solvent, yielding the advantages of material stability, low density, and a suitable freezing point near room temperature. Parameters that significantly affect extraction efficiency were optimized by the one-factor-at-a-time approach. Under optimal conditions, the recoveries of five target compounds were obtained ranging from 87.39 to 98.05% with correlation coefficients ranging from 0.9994 to 0.9997 for pure water. The limits of detection were in the range of 0.09-0.16 mu g/L. The enrichment factors were in the range of 171-188. Linearities were achieved in the range of 0.5-500 mu g/L. The proposed method was successfully applied to determine benzoylureas in environmental water samples with a satisfactory recovery of approximately 81.38-97.67%.
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