Preparation of molecularly imprinted polymers based on magnetic nanoparticles for the selective extraction of protocatechuic acid from plant extracts

• Published in: Journal of separation science Vol. 38; no. 6; pp. 1046 - 1052
• Main Authors: Xie, Xiaoyu, Wei, Fen, Chen, Liang, Wang, Sicen
• Format: Journal Article
• Language: English
• Published: Germany Blackwell Publishing Ltd 01.03.2015; Wiley Subscription Services, Inc
• Subjects: Acids; Adsorption; Araceae - chemistry; Binding; Chromatography; Cynomorium - chemistry; Extraction; Fourier transforms; Hydroxybenzoates - isolation & purification; Imprinted polymers; Infrared spectroscopy; Isotherms; Magnetic molecularly imprinted polymers; Magnetite Nanoparticles - chemistry; Materials selection; Molecular Imprinting; Nanoparticles; Plant extracts; Plant Extracts - isolation & purification; Polymers; Polymers - chemical synthesis; Polymers - chemistry; Protocatechuic acid; Solid Phase Extraction - instrumentation; Solid Phase Extraction - methods; Solid-phase extraction; Magnetic molecularly imprinted polymers; Protocatechuic acid; Solid-phase extraction; Plant extracts
• ISSN: 1615-9306; 1615-9314
• DOI: 10.1002/jssc.201401142

In this study, highly selective core–shell molecularly imprinted polymers on the surface of magnetic nanoparticles were prepared using protocatechuic acid as the template molecule. The resulting magnetic molecularly imprinted polymers were characterized by transmission electron microscopy, Fourier transform infrared spectroscopy, X‐ray diffraction, and vibrating sample magnetometry. The binding performances of the prepared materials were evaluated by static and selective adsorption. The binding isotherms were obtained for protocatechuic acid and fitted by the Langmuir isotherm model and Freundlich isotherm model. Furthermore, the resulting materials were used as the solid‐phase extraction materials coupled to high‐performance liquid chromatography for the selective extraction and detection of protocatechuic acid from the extracts of Homalomena occulta and Cynomorium songaricum with the recoveries in the range 86.3–102.2%.