scholarly journals Solid-Phase Extraction of Catechins from Green Tea with Deep Eutectic Solvent Immobilized Magnetic Molybdenum Disulfide Molecularly Imprinted Polymer

Molecules ◽  
2020 ◽  
Vol 25 (2) ◽  
pp. 280 ◽  
Author(s):  
Wanwan Ma ◽  
Kyung Ho Row
Keyword(s):  
Solid Phase Extraction ◽  
Green Tea ◽  
Solid Phase ◽  
Deep Eutectic Solvent ◽  
Epigallocatechin Gallate ◽  
Selective Recognition ◽  
Phase Extraction ◽  
Imprinted Polymer ◽  
Recognition Ability ◽  
Structural Analogues

A type of molecular-imprinted polymer with magnetic molybdenum disulfide as a base and deep eutectic solvent as a functional monomer (Fe3O4@MoS2@DES-MIP) was prepared with surface molecular imprinting method. It was applied as the adsorbent for the selective recognition and separation of (+)-catechin, (−)-epicatechin, (−)-epigallocatechin, (−)-epicatechin gallate, and (−)-epigallocatechin gallate in green tea in the process of magnetic solid-phase extraction (MSPE) combined with high-performance liquid chromatography (HPLC). The structure of Fe3O4@MoS2@DES-MIP was characterized by Fourier transform infrared spectroscopy and field emission scanning electron microscopy. The adsorption properties and selective recognition ability on (−)-epigallocatechin gallate and the other four structural analogues were examined and compared. The results show that the polymer has excellent selective recognition ability for (−)-epigallocatechin gallate, and its adsorption capacity was much higher than that of structural analogues. The Fe3O4@MoS2@DES-MIP not only has the special recognition ability to template a molecule, but also can be separated by magnets with high separation efficiency and can be used in MSPE.

scholarly journals Acrylamide-Modified 3-Aminopropyltriethoxysilanes Hybrid Monomer for Highly Selective Imprinting Recognition of Theophylline

2019 ◽  
Vol 58 (1) ◽  
pp. 75-82
Author(s):  
Yaying Lv ◽  
Qi Qu ◽  
Caiwen Li ◽  
Tao Zhu
Keyword(s):  
Green Tea ◽  
Solid Phase ◽  
Selective Recognition ◽  
Phase Extraction ◽  
Relative Standard ◽  
Recognition Ability ◽  
Binding Capability ◽  
Molecularly Imprinting Polymers ◽  
Satisfactory Recovery ◽  
Good Calibration

Abstract The hybrid monomer synthesized with 3-aminopropyltriethoxysilanes and acrylamide was applied for synthesis of molecularly imprinting polymers, and the obtained polymers were used as sorbent in solid-phase extraction for purification of theophylline (THP) in green tea. The static adsorption curves showed better molecular recognition ability and binding capability of the polymers for the target. On the optimized condition, a method was developed for increasing extraction of THP with satisfactory recovery of 93.7%. Good calibration linearity obtained in a range of 5–500 μg·mL−1. The recoveries at three spiked levels ranged from 86.7% to 100.7% with relative standard deviations ≤6.6% (n = 3). The result showed that the obtained polymers exhibited highly selective imprinting recognition to the analyte, and the number of templates was an important factor affecting the selective recognition ability of polymers. The proposed method with hybrid monomer imprinting polymers was successfully applied for purification of THP in green tea.

The Application of Molecularly Imprinted Polymers to Solid-Phase Extraction

2014 ◽  
Vol 893 ◽  
pp. 283-286
Author(s):  
Hong Ying Pei ◽  
Gui Jun Shen ◽  
Yu Du
Keyword(s):  
Solid Phase Extraction ◽  
Molecularly Imprinted Polymers ◽  
Biological Samples ◽  
Solid Phase ◽  
Phase Extraction ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Structural Analogues ◽  
Environmental And Biological Samples

A benefit of imprinted polymers is the possibility to prepare sorbents with selectivity pre-determined for a particular substance, or group of structural analogues. The application most close to a wider acceptance is probably that of solid phase extraction for clean-up of environmental and biological samples. The technique of molecularly imprinted polymers to solid phase extraction (MISPE) is performance and high selectively, compared with traditional sorbents. In this paper, the preparation and application of MIPs would be reviewed.

Synthesis and characterization of an ion-imprinted polymer for selective solid phase extraction of thorium(IV)

2011 ◽  
Vol 173 (3-4) ◽  
pp. 423-431 ◽  
Author(s):  
Zhiqiang Cheng ◽  
Hongqing Wang ◽  
Yuyuan Wang ◽  
Fangfang He ◽  
Haisheng Zhang ◽  
...  
Keyword(s):  
Solid Phase Extraction ◽  
Solid Phase ◽  
Synthesis And Characterization ◽  
Phase Extraction ◽  
Ion Imprinted Polymer ◽  
Imprinted Polymer ◽  
Ion Imprinted
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