State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
Department of Quality, AVIC Aerodynamics Research Institute, Harbin 150009, China.
Sci Total Environ. 2018 Mar 15;618:70-79. doi: 10.1016/j.scitotenv.2017.11.046. Epub 2017 Nov 8.
A simple and effective method based on magnetic separation has been developed for the extraction of organochlorine pesticides (OCPs) from river water samples using magnetoliposomes as adsorbents. This method avoided the time-consuming column passing process of loading large volume samples in traditional SPE through the rapid isolation of magnetoliposomes with an adscititious magnet. Lipid bilayers formed on the surface of FeO showed great adsorptive tendency towards analytes through hydrophobic interactions, and zwitterions headgroups endowed the outer surface of magnetoliposomes with hydrophilicity to improve the dispersing property of adsorbents in the sample matrix. The target analytes were detected by gas chromatography-tandem mass spectrometry, and the limits of detection obtained are in the range of 0.04-0.35ngL. The relative standard deviations of intra- and inter-day are in the range of 2-5% and 4-7%, respectively. The proposed method was employed for analysis of six OCPs in the surface water samples from two cities along the Songhua River in different seasons. Compared with the traditional methods, the proposed method could reduce the consumption of the organic solvent and shorten the sample preparation time.
一种基于磁分离的简单有效的方法已经被开发出来，用于从河水样品中提取有机氯农药（OCPs），方法是使用载脂蛋白作为吸附剂。该方法通过外加磁铁快速分离载脂蛋白，避免了传统 SPE 中加载大体积样品的耗时柱通过过程。FeO 表面形成的脂质双层通过疏水相互作用对分析物表现出很大的吸附倾向，而两性离子头基赋予载脂蛋白的外表面亲水性，以提高吸附剂在样品基质中的分散性。目标分析物通过气相色谱-串联质谱法进行检测，所得到的检测限范围为 0.04-0.35ngL。日内和日间相对标准偏差分别在 2-5%和 4-7%的范围内。该方法用于分析松花江两岸两个城市不同季节地表水样品中的六种 OCPs。与传统方法相比，该方法可以减少有机溶剂的消耗并缩短样品制备时间。
