scholarly journals Adsorption and selectivity studies of direct and magnetite-cored molecularly imprinted polymers (MIPs and magMIPs) towards chosen chalcones investigated with various analytical methods

RSC Advances ◽  
2021 ◽  
Vol 11 (41) ◽  
pp. 25334-25347
Author(s):  
Mateusz Pawlaczyk ◽  
Maria Guć ◽  
Grzegorz Schroeder
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Analytical Methods ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Selectivity Studies

The following article presents a method for obtaining molecularly imprinted polymers (MIPs) and their magnetic equivalents (magMIPs) using chalcones as imprinting molecules, and their application for direct and competitive chalcones' adsorption.

Analytical Methods Incorporating Molecularly Imprinted Polymers (MIPs) for the Quantification of Microcystins: A Mini-Review

2021 ◽  
pp. 1-15
Author(s):  
P. U. Ashvin Iresh Fernando ◽  
Matthew W. Glasscott ◽  
Kaytee Pokrzywinski ◽  
Brianna M. Fernando ◽  
Gilbert K. Kosgei ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Analytical Methods ◽  
Molecularly Imprinted ◽  
Imprinted Polymers

scholarly journals Application of molecularly imprinted polymers in food analysis: clean-up and chromatographic improvements

2012 ◽  
Vol 10 (3) ◽  
pp. 766-784 ◽  
Author(s):  
Patricia Regal ◽  
Mónica Díaz-Bao ◽  
Rocío Barreiro ◽  
Alberto Cepeda ◽  
Cristina Fente
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Analytical Methods ◽  
Solid Phase ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Molecular Imprinting Technology ◽  
Separation Of Isomers ◽  
The Matrix ◽  
Time Required ◽  
Veterinary Products

AbstractSeveral natural and synthetic substances have been monitored in analytical laboratories worldwide to ensure food safety. Multiple residue detection (i.e., detection of multiple analytes in a single sample or matrix) is a main weakness of existing analytical methods, when fast and reliable results are required. Multianalyte approaches may save time and money in the food industry, and more importantly, they allow the quick release of food products into the marketplace. In addition, multianalyte approaches notably decrease the time required between sampling and analysis to meet legal requirements. However, to achieve analytical success, it is necessary to develop thorough clean-up procedures to extract analytes from the matrix. In addition, good chromatographic separation methods are also necessary to distinguish closely related analytes. Molecular imprinting technology (MIT) is an emerging, powerful tool for sample extraction and chromatography. First used for solid-phase extraction, molecularly imprinted polymers (MIPs) are also effective chromatographic phases for the separation of isomers and structurally related molecules. In recent years, a number of analytical methods utilising MIT have been applied for the analysis of residues in food, and existing methodologies have been improved. This review article describes the latest applications of MIT in the development of methodologies to monitor the presence of residues of veterinary products in foodstuff.

scholarly journals Effect of Formulation on the Binding Efficiency and Selectivity of Precipitation Molecularly Imprinted Polymers

Molecules ◽  
2018 ◽  
Vol 23 (11) ◽  
pp. 2996 ◽  
Author(s):  
K. Lim ◽  
Clovia Holdsworth
Keyword(s):  
Molecularly Imprinted Polymers ◽  
1H Nmr Spectroscopy ◽  
Binding Capacity ◽  
Minimal Effect ◽  
Initiator Concentration ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Feed Formulation ◽  
Crosslinker Content ◽  
Selectivity Studies

This study investigated the effect of feed formulation: the template:functional monomer (T:fM) and functional monomer:crosslinker (fM:X) ratios as well as the initiator concentration, on the binding performance and selectivity of caffeine (CAF) and theophylline (THP) imprinted polymers obtained by precipitation polymerisation in acetonitrile at 60 °C using methacrylic acid (MAA) and ethylene glycol dimethacrylate (EGDMA) as functional monomer and crosslinker, respectively. Template incorporation, monitored by quantitative 1H-NMR spectroscopy, ranged from 8 to 77% and was found to be more favourable at both high and low T:fM ratios, low fM:X ratio and high initiator concentration. The resulting T:fM ratio in most MIPs were found to be lower than their feed ratios. Incorporation of THP into the polymers was observed to be consistently higher than CAF and, for most MIPs, the observed binding capacities represent less than 10% of the incorporated template. Improved imprinting factors were obtained from molecularly imprinted polymers (MIPs) with high crosslinker content, i.e., fM:X ratio of 1:10, and high initiator concentration, i.e., initiator:total monomer (I:tM) ratio of 1:5, while T:fM ratio (1:2 to 1:8) was found not to influence binding capacities and imprinting factors (IF). The NIPs showed no preference for either CAF or THP in competitive selectivity studies while MIPs were observed to bind preferentially to their template with THP displaying higher selectivity (72–94%) than CAF (63–84%). Template selectivity was observed to increase with increasing initiator concentration, with MIPs from I:tM ratio of 1:5 shown to be the most selective towards CAF (84%) and THP (93%). The fM:X ratio only showed minimal effect on MIP selectivity. Overall, for the MIP systems under study, template incorporation, binding capacity, imprinting factor and selectivity are enhanced at a faster rate of polymerisation using an I:tM ratio of 1:5. Polymer particles obtained were between 66 to 140 nm, with MIPs generally smaller than their NIP counterparts, and have been observed to decrease with increasing T:fM and fM:X ratios and increase with increasing initiator concentration.

Preparation of Benzonic Acid Molecularly Imprinted Polymers and Its Adsorption Property

2010 ◽  
Vol 38 (3) ◽  
pp. 401-404
Author(s):  
Da-Wei LOU ◽  
Ying-Jie YANG ◽  
Guang HUANG ◽  
Ping-Li PU ◽  
Xin-Qing LEE ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymers ◽  
Adsorption Property ◽  
Molecularly Imprinted ◽  
Imprinted Polymers

scholarly journals Adsorption Capacity and Selectivity of Molecularly Imprinted Polymers towards β-Sitosterol

2019 ◽  
Vol 31 (11) ◽  
pp. 2527-2531
Author(s):  
St. Fauziah ◽  
N.H. Soekamto ◽  
P. Budi ◽  
P. Taba
Keyword(s):  
Adsorption Capacity ◽  
Molecularly Imprinted Polymers ◽  
Solid Phase ◽  
Polymerization Reaction ◽  
Molecularly Imprinted ◽  
Imprinted Polymers ◽  
Sample Extract ◽  
Uv Visible ◽  
Adsorption Desorption ◽  
Isothermal Equation

Molecularly imprinted polymers (MIP) as an adsorbent has been synthesized using β-sitosterol as molecule template on free radical polymerization reaction. The capacity and selectivity of the adsorption from MIP to β-sitosterol was studied in this study. The β-sitosterol concentration in the adsorption-desorption test and the MIP selectivity test were analyzed by UV-visible and HPLC. The MIP obtained from the synthesis results in a high adsorption capacity. Based on the Freundlich adsorption isothermal equation, the adsorption capacity (k) was found to be 1.24 mg/g. The MIP can adsorb 100 % β-sitosterol while cholesterol was only 3 %. The MIP is most selective to β-sitosterol, therefore, has high potential to apply as adsorbent at solid phase extraction method to isolate β-sitosterol from sample extract.

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