期刊
JOURNAL OF SEPARATION SCIENCE
卷 34, 期 13, 页码 1503-1507出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/jssc.201000855
关键词
DLLME; Ionic liquid; Phthalate esters
资金
- Beijing Natural Science Foundation [8092008]
- Air Pollution Control and Innovative Technical Team [PHR201007105]
Ionic liquid-based dispersive liquid-liquid micro-extraction (IL-DLLME) was coupled with high-performance liquid chromatography-ultraviolet (HPLC-UV) for the determination of four phthalate esters, including butyl benzyl phthalate, di-n-butyl phthalate, dicyclohexyl phthalate and bis(2-ethylhexyl) phthalate in water samples. The mixture of ionic liquid (IL) and dispersive solvent was rapidly injected into 10 mL aqueous sample. Then, IL phase was separated by centrifugation and was determined by high-performance liquid chromatography-ultraviolet. The factors influencing the extraction efficiency, such as type and volume of IL, disperse solvent, extraction time, centrifuging time and ionic strength, were investigated and optimized. Under the optimized conditions, the extraction recoveries by the proposed ionic liquid-based dispersive liquid-liquid micro-extraction for the four phthalates ranged from 83.0 to 91.7%. The relative standard deviations were between 7.8 and 15%. The limits of quantification for four phthalates were between 10.6 and 28.5 mg/L. The proposed method was successfully applied for the analysis of PAEs in tap, lake and treated wastewater samples.
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