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Molecular imprinted polymers based on magnetic chitosan with different deep eutectic solvent monomers for the selective separation of catechins in black tea
Author(s) -
Ma Wanwan,
Dai Yunliang,
Row Kyung Ho
Publication year - 2018
Publication title -
electrophoresis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.666
H-Index - 158
eISSN - 1522-2683
pISSN - 0173-0835
DOI - 10.1002/elps.201800034
Subject(s) - deep eutectic solvent , molecularly imprinted polymer , gallate , adsorption , chemistry , fourier transform infrared spectroscopy , chitosan , monomer , selective adsorption , solid phase extraction , catechin , polymer , extraction (chemistry) , nuclear chemistry , selectivity , eutectic system , chromatography , chemical engineering , organic chemistry , polyphenol , alloy , engineering , antioxidant , catalysis
Two types of molecular‐imprinted polymers‐based magnetic chitosan with facile deep eutectic solvent‐functional monomers (Fe 3 O 4 ‐CTS@DES‐MIPs) were synthesized and applied as adsorbents in magnetic solid‐phase extraction (MSPE) for the selective recognition and separation of (+)‐catechin, (−)‐epicatechin, and (−)‐epigallocatechin gallate in black tea. The obtained Fe 3 O 4 ‐CTS@DES‐MIPs were characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The selective recognition ability was examined by adsorption experiments. The actual amounts of (+)‐catechin, (−)‐epicatechin, and (−)‐epigallocatechin gallate extracted from black tea using Fe 3 O 4 ‐CTS@DES‐MIPs by the MSPE method were 13.10, 6.32, and 8.76 mg/g, respectively. In addition, the magnetic Fe 3 O 4 ‐CTS@DES‐MIPs showed outstanding recognition and selectivity. Therefore, it can be used to separate bioactive compounds from black tea. The new‐type of DES adopted as the functional monomer in this paper provides a new perspective for the recognition and separation of bioactive compounds.