中文摘要：本文开发了一个微波辅助离子液体/离子液体分散液相微萃取法，与高效液相色谱法联用可快速富集和分析果汁中的三嗪类除草剂残留。与传统方法中使用有害的有机溶剂不同，本方法采用疏水性离子液体（己基-3-甲基咪唑六氟磷酸盐）和亲水性离子液体（1-丁基-3-甲基咪唑四氟硼酸盐）分别作为萃取剂和分散剂，本文采用在1-丁基-3-甲基咪唑四氟硼酸盐溶液的帮助下完全分散到样本中的己基-3-甲基咪唑六氟磷酸盐形成的浑浊液体诱导萃取过程，并使用离子对试剂（NH4PF6）来提高离子液体回收率，此外还对影响萃取效率的试验参数进行了研究。在最佳条件下，线性范围在5.00-250.00 μg/L之间，相关系数为0.9982-0.9997，该方法成功的应用于四种果汁中三嗪类除草剂残留检测，回收率在76.7%-105.7%之间，相对标准差低于6.6%；总之，该方法是一种快速、有效、可靠的果汁样品三嗪类除草剂残留检测方法。
外文摘要：A novel microextraction method, termed microwave-assisted ionic liquid/ionic liquid dispersive liquid-liquid microextraction, has been developed for the rapid enrichment and analysis of triazine herbicides in fruit juice samples by high-performance liquid chromatography. Instead of using hazardous organic solvents, two kinds of ionic liquids, a hydrophobic ionic liquid (1-hexyl-3-methylimidazolium hexafluorophosphate) and a hydrophilic ionic liquid (1-butyl-3-methylimidazolium tetrafluoroborate), were used as the extraction solvent and dispersion agent, respectively, in this method. The extraction procedure was induced by the formation of cloudy solution, which was composed of fine drops of 1-hexyl-3-methylimidazolium hexafluorophosphate dispersed entirely into sample solution with the help of 1-butyl-3-methylimidazolium tetrafluoroborate. In addition, an ion-pairing agent (NH4PF6) was introduced to improve recoveries of the ionic liquid phase. Several experimental parameters that might affect the extraction efficiency were investigated. Under the optimum experimental conditions, the linearity for determining the analytes was in the range of 5.00-250.00 mu g/L, with the correlation coefficients of 0.9982-0.9997. The practical application of this effective and green method is demonstrated by the successful analysis of triazine herbicides in four juice samples, with satisfactory recoveries (76.7-105.7%) and relative standard deviations (lower than 6.6%). In general, this method is fast, effective, and robust to determine triazine herbicides in juice samples.
 
外文关键词：dispersive liquid-liquid microextraction, hydrophilic ionic liquids, hydrophobic ionic liquids, microwave-assisted extraction, triazine herbicides
作者：Su, Rui; Li, Dan; Wu, Lijie; Han, Jing; Lian, Wenhui; Wang, Keren; Yang, Hongmei
作者单位：Changchun Univ Chinese Med, Jilin Ginseng Acad, 1035 Boshuo Rd, Changchun 130117, Jilin, Peoples R China.
期刊名称：JOURNAL OF SEPARATION SCIENCE
期刊影响因子：2.557
出版年份：2017
出版刊次：14
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