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Reference type: Journal
Authors: Fan JP, Li L, Tian ZY, Xie CF, Xue Y, Xie YL, Xu R, Qin Y, Zhang XH, Zhu JH
Article Title: Synthesis and Evaluation of Uniformly Sized Synephrine-Imprinted Microparticles Prepared by Precipitation Polymerization.
Publication date: 2014
Journal: Separation Science and Technology
Volume: 49
Issue: (2)
Page numbers: 258-266.
DOI: 10.1080/01496395.2013.837073

Abstract: Uniformly sized synephrine molecularly imprinted polymer (MIP) microparticles were prepared via precipitation polymerization. The presence of the template, the amount of monomer, crosslinker, and porogenic solvent could affect the size distribution and morphology of the polymers. The pseudo-second-order kinetic model could provide a better correlation for the adsorption than the pseudo-first-order model. The intraparticle diffusion study showed that the sorption involved intraparticle diffusion, but that was not the only rate-controlling step. The equilibrium data better fit the Freundlich model than the Langmuir model. The Scatchard plot of MIPs revealed MIPs had two groups of sites with different affinities. Subsequent recognition selectivity experiments demonstrated preferential structural selectivity for synephrine with respect to other structurally similar compounds (i.e., octopamine and tyramine). Compared with the bulk MIP of SYN, the SYN MIP microparticles in this work had higher adsorption selectivity and capacity due to their smaller particle sizes; moreover, the precipitation polymerization was time-saving due to not using a crash-and-sieve process
Template and target information: synephrine
Author keywords: microparticles, molecular recognition, molecularly imprinted polymer, precipitation polymerization, Synephrine


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