Zhang YueYue, Tang Dingliang, Wu Yuanfei, Huang Xiaojia
College of the Environment and Ecology, Xiamen University, Xiamen, 361005, China.
College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
Mikrochim Acta. 2024 Dec 6;192(1):10. doi: 10.1007/s00604-024-06851-x.
A new fluorinated imprinted adsorbent (MIA) for magnetic solid phase extraction (MSPE) of liquid crystal monomer (LCM) pollutants was one-pot prepared within 3.5 h using 4-[difluoro(3,4,5-trifluorophenoxy)methyl]-3,5-difluoro-4'-ethyl-biphenyl (DFBP) as template and 1H,1H,2H,2H-heptadecafluorodecyl acrylate/vinylanthracene as dual monomers. The structure, morphology, and magnetic properties of MIA fabricated were investigated by various characterization techniques. Under the optimal conditions the prepared MIA presented satisfactory specific recognition performance. The recognition factor and adsorption capacity towards DFBP were 2.7 and 15.9 mg/g, respectively. The specific recognition behaviors of MIA/MSPE towards DFBP were surveyed by means of adsorption kinetics and adsorption isotherms. Combining MSPE with HPLC coupled to a diode array detector (DAD), a sensitive, reliable and anti-interference method for the monitoring of LCMs residuals in various environmental water and soil samples was established. The achieved enrichment factors were 132-248 and 96-204 in water and soil samples, respectively. The corresponding limits of detection were 0.0017-0.0051 μg/L and 0.087-0.28 μg/kg, respectively. Moreover, confirmatory experiments were adopted to inspect the accuracy of the established MIA/MSPE-HPLC/DAD approach. To the best of our knowledge, this is the first time that an imprinted material has been used for specific isolation and capture of LCMs which have been classified as emerging organic pollutants.
一种用于磁性固相萃取（MSPE）液晶单体（LCM）污染物的新型氟化印迹吸附剂（MIA），以4-[二氟（3,4,5-三氟苯氧基）甲基]-3,5-二氟-4'-乙基联苯（DFBP）为模板，丙烯酸1H,1H,2H,2H-十七氟癸酯/乙烯基蒽为双单体，在3.5小时内一锅法制备而成。通过各种表征技术研究了所制备MIA的结构、形态和磁性。在最佳条件下，所制备的MIA表现出令人满意的特异性识别性能。对DFBP的识别因子和吸附容量分别为2.7和15.9 mg/g。通过吸附动力学和吸附等温线研究了MIA/MSPE对DFBP的特异性识别行为。将MSPE与配备二极管阵列检测器（DAD）的HPLC相结合，建立了一种灵敏、可靠且抗干扰的方法，用于监测各种环境水和土壤样品中LCMs的残留量。在水和土壤样品中实现的富集因子分别为132 - 248和96 - 204。相应的检测限分别为0.0017 - 0.0051 μg/L和/0.087 - 0.28 μg/kg。此外，采用验证实验来检验所建立的MIA/MSPE - HPLC/DAD方法的准确性。据我们所知，这是首次将印迹材料用于特异性分离和捕获已被归类为新兴有机污染物的LCMs。
