Ye Cunling, Liu Chang, Wang Shen, Wang Zhike
School of Chemistry and Chemical Engineering, Henan Normal University.
Anal Sci. 2017;33(2):229-234. doi: 10.2116/analsci.33.229.
Based on the tunability of ionic liquids (ILs) according to the specific requirement of an application, 1-dodecylimidazolium chloride with amphiphilic structures was chemically fabricated on the surface of filter papers (DIL-FPs) for the first time. After synthesis, DIL-FPs was characterized by scanning electronic microscopy, energy dispersive X-ray spectroscopy and Fourier-transform infrared spectroscopy. DIL-FPs was used as a novel thin-film microextraction (TFME) phase for the preconcentration of amphiphilic bisphenol A from plant oil samples. The related extraction variables were studied in a spiked sunflower seed oil. Under the optimal conditions, the linear range was 5.0 - 1000 μg L with a correlation coefficient of 0.9976. The limit of detection (S/N = 3) and the enrichment factor of the proposed method were 2.7 μg L and 118, respectively. The intra-day precision and inter-day precision for six repeated determinations were 2.3 and 4.9%, respectively. These plant oil samples used in this work were free of bisphenol A contaminations. The recovery study carried out in different plant oil samples and mean recoveries ranged from 77.16 to 97.10%. The developed DIL-FPs extraction film phase followed by HPLC-UV provides a potential pretreatment strategy for the analysis of weak organic acid compounds in plant oil samples.
基于离子液体（ILs）可根据应用的特定要求进行调节的特性，首次在滤纸表面化学制备了具有两亲结构的1-十二烷基咪唑氯化物（DIL-FPs）。合成后，通过扫描电子显微镜、能量色散X射线光谱和傅里叶变换红外光谱对DIL-FPs进行了表征。DIL-FPs被用作一种新型的薄膜微萃取（TFME）相，用于从植物油样品中预富集两亲性双酚A。在加标向日葵籽油中研究了相关的萃取变量。在最佳条件下，线性范围为5.0 - 1000 μg/L，相关系数为0.9976。该方法的检测限（S/N = 3）和富集因子分别为2.7 μg/L和118。六次重复测定的日内精密度和日间精密度分别为2.3%和4.9%。本研究中使用的这些植物油样品不含双酚A污染。在不同植物油样品中进行的回收率研究，平均回收率在77.16%至97.10%之间。所开发的DIL-FPs萃取膜相结合HPLC-UV为植物油样品中弱有机酸化合物的分析提供了一种潜在的预处理策略。
