title: Polydopamine-coated magnetic molecularly imprinted polymer for the selective solid-phase extraction of cinnamic acid, ferulic acid and caffeic acid from radix scrophulariae sample.
abstract: We describe novel cinnamic acid polydopamine-coated magnetic imprinted polymers for the simultaneous selective extraction of cinnamic acid, ferulic acid and caffeic acid from radix scrophulariae sample. The novel magnetic imprinted polymers were synthesized by surface imprinting polymerization using magnetic multi-walled carbon nanotubes as the support material, cinnamic acid as the template and dopamine as the functional monomer. The magnetic imprinted polymers were characterized by transmission electron microscopy, scanning electron microscopy, Fourier transform infrared spectroscopy and vibrating sample magnetometry. The results revealed that the magnetic imprinted polymers had outstanding magnetic properties, high adsorption capacity, selectivity and fast kinetic binding toward cinnamic acid, ferulic acid and caffeic acid. Coupled with high-performance liquid chromatography, the extraction conditions of the magnetic imprinted polymers as a magnetic solid-phase extraction sorbent were investigated in detail. The proposed imprinted magnetic solid phase extraction procedure has been used for the purification and enrichment of cinnamic acid, ferulic acid and caffeic acid successfully from radix scrophulariae extraction sample with recoveries of 92.4-115.0% for cinnamic acid, 89.4-103.0% for ferulic acid and 86.6-96.0% for caffeic acid.
authors.affiliation: College of Chemistry and Chemical Engineering, Jishou University, Jishou, China.
authors.forename: Yuli
authors.initials: Y
authors.lastname: Yin
authors.affiliation: College of Chemistry and Chemical Engineering, Jishou University, Jishou, China.
authors.forename: Liang
authors.initials: L
authors.lastname: Yan
authors.affiliation: College of Chemistry and Chemical Engineering, Jishou University, Jishou, China.|Key Laboratory of Mineral Cleaner Production and Exploit of Green Functional Materials in Hunan Province, Jishou University, Jishou, China.|State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha, China.
authors.forename: Zhaohui
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: College of Chemistry and Chemical Engineering, Jishou University, Jishou, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Wang
authors.affiliation: College of Chemistry and Chemical Engineering, Jishou University, Jishou, China.
authors.forename: Ningjing
authors.initials: N
authors.lastname: Luo
mesh_terms: D002109:Caffeic Acids / Q000737:chemistry / Q000302:isolation & purification; D002934:Cinnamates / Q000737:chemistry / Q000302:isolation & purification; D003373:Coumaric Acids / Q000737:chemistry / Q000302:isolation & purification; D007211:Indoles / Q000737:chemistry*; D058185:Magnetite Nanoparticles / Q000737:chemistry*; D054802:Molecular Imprinting; D010316:Particle Size; D011108:Polymers / Q000737:chemistry*; D032266:Scrophularia / Q000737:chemistry*; D052616:Solid Phase Extraction; D013499:Surface Properties
chemical_list: D002109:Caffeic Acids; D002934:Cinnamates; D003373:Coumaric Acids; D007211:Indoles; D058185:Magnetite Nanoparticles; D011108:Polymers; C568283:polydopamine; C029010:cinnamic acid; C004999:ferulic acid; C040048:caffeic acid
keywords: Cinnamic acid; Magnetic molecularly imprinted polymers; Magnetic solid-phase extraction; Polydopamine