In this study, porous ZnFe₂O₄/carbon, derived from Zn-Fe zeolitic imidazolate framework (Zn-Fe-ZIF), was employed as a novel sorbent for magnetic-assisted dispersive miniaturized solid phase extraction (M-DμSPE). The Zn-Fe-ZIF derived magnetic porous ZnFe₂O₄/carbon was easily prepared using a one-pot solvothermal method, and its morphology, structure and magnetic characteristics were evaluated via scanning electron microscopy, powder X-ray diffraction, Raman spectroscopy and vibrating sample magnetometry. The extraction ability of ZnFe₂O₄/carbon is evaluated by different kinds of compounds including organochlorine pesticides, pyrethroid insecticides, aldehydes, nerolidol, benzoic acid and sorbic acid. A M-DμSPE method was developed for the analysis of organochlorine pesticides. Several parameters affecting the extraction efficiency were systematically investigated. The calibration curves ranged from 0.05 to 100 ng g⁻¹ and the limits of detection were 0.005–0.3 ng g⁻¹. The intra-day and inter-day relative standard deviations were lower than 2.3 and 5.2%. The recoveries of spiked organochlorine pesticides were in the range of 86.1–109.4%.

在这项研究中，从Zn-Fe沸石咪唑酸盐骨架（Zn-Fe-ZIF）衍生的多孔ZnFe ₂ O ₄ /碳被用作磁性辅助分散微型固相萃取（M-DμSPE）的新型吸附剂。Zn-Fe-ZIF衍生的磁性多孔ZnFe ₂ O ₄ /碳很容易使用一锅溶剂热法制备，并且其形态，结构和磁特性通过扫描电子显微镜，粉末X射线衍射，拉曼光谱和振动样品磁力计。ZnFe ₂ O ₄的萃取能力碳通过不同种类的化合物进行评估，包括有机氯农药，拟除虫菊酯类杀虫剂，醛，nerolidol，苯甲酸和山梨酸。开发了一种M-DμSPE方法来分析有机氯农药。系统地研究了影响萃取效率的几个参数。校准曲线的范围为0.05至100 ng g ^-1，检出限为0.005–0.3 ng g ^-1。日内和日间相对标准偏差低于2.3和5.2％。加标的有机氯农药的回收率在86.1–109.4％的范围内。