磁性金属有机框架表面分子印迹的制备及富集蔬菜样品中2,4-二氯苯氧乙酸的应用  

Preparation of Molecular Imprinting on Surface of Magnetic Metal-Organic Framework and Application of Enrichment of 2,4-Dichlorophenoxyacetic Acid in Vegetables Samples

作　　者：麻敏瑞 祝新月[1] 刘晓燕[1] 张海霞[1] MA Min-rui;ZHU Xin-yue;LIU Xiao-yan;ZHANG Hai-xia(College of Chemistry and Chemical Engineering,Lanzhou University,Lanzhou 730000,China)

机构地区：[1]兰州大学化学化工学院,甘肃兰州730000

出　　处：《分析测试技术与仪器》2021年第4期260-272,共13页Analysis and Testing Technology and Instruments

摘　　要：以固相研磨法制备的磁性金属有机框架为基质,2,4-二氯苯酚为傀儡模板分子,3-氨基丙基三乙氧基硅烷为功能单体,在室温下通过溶胶-凝胶法制备了磁性分子印迹材料Fe_(3)O_(4)@ZIF-MIP.使用X射线衍射、红外光谱、扫描电镜、透射电镜和氮气吸附对分子印迹材料进行了表征.当2,4-苯氧乙酸的质量浓度为500μg/mL时,Fe_(3)O_(4)@ZIF-MIP的吸附容量为120.31 mg/g,印迹因子为3.64,材料重复使用6次后性能保持在95%以上,所建立的方法适用于蔬菜中低含量2,4-二氯苯氧乙酸含量的富集.The magnetic molecular-imprinted material Fe_(3)O_(4)@ZIF-MIP was prepared by a sol-gel method at room temperature with magnetic metal-organic frameworks as the matrixes,2,4-dichlophenol as the pseudotemplate molecule and 3-aminopropyltriethoxysilane as the functional monomer.The molecular-imprinted materials were characterized by X-ray diffraction,infrared spectroscopy,scanning electron microscopy,transmission electron microscopy and nitrogen adsorption.The adsorption capacity of Fe_(3)O_(4)@ZIF-MIP was 120.31 mg/g at a concentration of 500μg/mL of 2,4-phenoxyacetic acid,and the blotting factor was 3.64,the properties of the material remained above 95%after repeated use for 6 times,and the established method is suitable for the enrichment of low content 2,4-dichlorophenoxyacetic acid in vegetables.

关 键 词：2 4-二氯苯氧乙酸 分子印迹 磁固相萃取 

分 类 号：O641.4[理学—物理化学] O635[理学—化学]