title: Synergetic recognition and separation of kelthane and pyridaben base on magnetic molecularly imprinted polymer nanospheres.
abstract: We present novel magnetic composite nanospheres for the preparation of a nanoiron oxide/carbon dots/β-cyclodextrin/molecularly imprinted polymer for the selective solid-phase extraction kelthane and pyridaben from vegetables. The molecularly imprinted polymer was synthesized on the surface of nano-iron oxide/carbon dots via a chemical polymerization procedure, where kelthane-β-cyclodextrin and pyridaben-β-cyclodextrin inclusion complexes were used as template molecules, and their adsorption behavior was investigated in detail. Characterization analysis and binding experiments revealed that magnetic composite nanospheres had outstanding magnetic properties, a large adsorption capacity, and high competitive selectivity for kelthane and pyridaben. The magnetic composite nanospheres were employed as an adsorbent in solid-phase extraction for the determination of kelthane and pyridaben in vegetable samples. The recoveries of kelthane and pyridaben were 92.8-105.2 and 94.4-104.6%, respectively.
authors.affiliation: Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, China. happylishuhuai@163.com.
authors.forename: Shuhuai
authors.initials: S
authors.lastname: Li
authors.affiliation: Shenyang Agricultural University Analysis and Test Center, Shenyang, China.
authors.forename: Mingze
authors.initials: M
authors.lastname: Xu
authors.affiliation: Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, China.
authors.forename: Xuejin
authors.initials: X
authors.lastname: Wu
authors.affiliation: Analysis and Test Center of Chinese Academy of Tropical Agricultural Sciences, Laboratory of Quality and Safety Risk Assessment for Tropical Products (Haikou) Ministry of Agriculture, Haikou, China. luocatas@21cn.com.
authors.forename: Jinhui
authors.initials: J
authors.lastname: Luo
keywords: Insecticides; Kelthane; Magnetite particles; Molecularly imprinted polymers; Pyridaben