title: Preparation of molecularly imprinted polymeric microspheres based on distillation-precipitation polymerization for an ultrasensitive electrochemical sensor.
abstract: A highly sensitive electrochemical sensor based on a carbon paste electrode (CPE) modified with molecularly imprinted polymeric microspheres (MIPMSs) was developed for the determination of bisphenol A (BPA). For the first time BPA-imprinted MIPMSs were prepared via distillation precipitation polymerization, and then the polymeric microspheres were involved in producing the MIPMS-modified CPE (MIPMS/CPE). The polymers obtained were observed via a scanning electron microscope and its dynamic and static adsorption performances were investigated. Cyclic voltammetry and electrochemical impedance spectroscopy were performed to study the preparation process and electrochemical behavior of the modified carbon paste electrodes with [Fe(CN)6]3-/4-ions acting as electrical indicators. Compared with the bulk MIP packed sensor, the MIPMS/CPE exhibits a higher sensing response and better reproducibility. The detection linear range for BPA is 1 × 10-11-1 × 10-7M with a detection limit of 2.8 × 10-12M (S/N = 3) under the optimal experimental conditions. Moreover, the MIPMS/CPE exhibited good selectivity and stability. The developed sensor can determine BPA in real samples including soil, milk and water rapidly and accurately after simple sample pretreatment.
authors.affiliation: School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China. liyingchun@hit.edu.cn.
authors.forename: Yuan
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Key Laboratory of Xinjiang Phytomedicine Resources of Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832000, China.
authors.forename: Lu
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Key Laboratory of Xinjiang Phytomedicine Resources of Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832000, China.
authors.forename: Na
authors.initials: N
authors.lastname: Zhao
authors.affiliation: Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
authors.forename: Yajie
authors.initials: Y
authors.lastname: Han
authors.affiliation: Jiangsu Devote Instrumental Science & Technology Co., Ltd, Huai'an, Jiangsu 223001, China.
authors.forename: Feilang
authors.initials: F
authors.lastname: Zhao
authors.affiliation: College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China.
authors.forename: Zhengchun
authors.initials: Z
authors.lastname: Peng
authors.affiliation: School of Science, Harbin Institute of Technology (Shenzhen), Shenzhen 518055, China. liyingchun@hit.edu.cn and Key Laboratory of Xinjiang Phytomedicine Resources of Ministry of Education, School of Pharmacy, Shihezi University, Shihezi 832000, China.
authors.forename: Yingchun
authors.identifier: http://orcid.org/0000-0002-5371-3587
authors.initials: Y
authors.lastname: Li