专业从事离子液体的合成、应用及其相关技术的研究工作----Lanzhou Greenchem ILs/青岛奥立科

题名

[Wiley数据库][2012]ionic liquid-based dispersive liquid–liquid microextraction with back-extraction coupled with capillary electrophoresis to determine phenolic compounds

参考引用方式

Caihong Zhou, Shanshan Tong, Yunxia Chang, Qiong Jia, Weihong Zhou. Electrophoresis 2012, 33 , 1331–1338

研究机构

吉林大学

所涉及离子液体

1-辛基-3-甲基咪唑六氟磷酸盐        304680-36-2

研究领域

毛细管电泳；分散液-液微萃取；酚类化合物检测

论文摘要

Ionic liquid (IL) based dispersive liquid–liquid microextraction (DLLME) with backextraction coupled with capillary electrophoresis ultraviolet detection was developed to determine four phenolic compounds (bisphenol-A, β-naphthol, α-naphthol, 2, 4-dichlorophenol) in aqueous cosmetics. The developed method was used to preconcentrate and clean up the four phenolic compounds including two steps. The analytes were transferred into room temperature ionic liquid (1-octyl-3-methylimidazolium hexafluorophosphate, [C8MIM][PF6]) rich-phase in the first step. In the second step, the analytes were back-extracted into the alkaline aqueous phase. The effects of extraction parameters, such as type and volume of extraction solvent, type and volume of disperser, extraction and centrifugal time, sample pH, salt addition, and concentration and volume of NaOH in back-extraction were investigated. Under the optimal experimental conditions, the preconcentration factors were 60.1 for bisphenol-A, 52.7 for β-naphthol, 49.2 for α-naphthol, and 18.0 for 2, 4-dichlorophenol. The limits of detection for bisphenol-A, β-naphthol, α-naphthol and 2, 4-dichlorophenol were 5, 5, 8, and 100 ng mL−1, respectively. Four kinds of aqueous cosmetics including toner, soften lotion, make-up remover, and perfume were analyzed and yielded recoveries ranging from 81.6% to 119.4%. The main advantages of the proposed method are quick, easy, cheap, and effective.

关键词

Capillary electrophoresis/ Cosmetics/ Dispersive liquid–liquid microextraction/ Phenolic compounds / Room temperature ionic liquids