【摘 要】
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An ionic liquid-based single-drop microextraction (IL-SDME) procedure using IL as an extractant on-line coupled to capillary electrophoresis (CE) is proposed.In this method, a drop of hydrophobic IL w
【机 构】
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Key Laboratory of Chemistry of Northwestern Plant Resources and Key Laboratory for Natural Medicine
【出 处】
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第2届大连国际色谱学术报告会、第37届国际高效液相色谱及相关技术会议、第18届全国色谱学术报告会
论文部分内容阅读
An ionic liquid-based single-drop microextraction (IL-SDME) procedure using IL as an extractant on-line coupled to capillary electrophoresis (CE) is proposed.In this method, a drop of hydrophobic IL was formed at the tip of the capillary column and immersed in the aqueous sample for the extraction.For the SDME of three phenols, a 2.40 nL IL microdrop was exposed for 10 min to the aqueous sample and then was directly injected into the capillary column for analysis.Extraction parameters such as the extraction time, the IL single-drop volume, pH of the sample solution, ionic strength, volume of the sample solution and the extraction temperature were systematically investigated.Detection limits to three phenols were 0.005-0.05 μg mL-1, and their calibration curves were all linear (R2 >0.9994) in the range from 0.05 to 50 μg mL-1.And enrichment factors for three phenols were 156, 107 and 257 without agitation, respectively.This method was then utilized to analyze two real environmental samples from Yellow River and tap water, obtaining satisfactory results.
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