MIPs logo MIPdatabase      Use this space
Custom Search
Reference type: Journal
Authors: Moussa M, Pichon V, Mariet C, Vercouter T, Delaunay N
Article Title: Potential of ion imprinted polymers synthesized by trapping approach for selective solid phase extraction of lanthanides.
Publication date: 2016
Journal: Talanta
Volume: 161
Page numbers: 459-468.
DOI: 10.1016/j.talanta.2016.08.069
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0039914016306531

Abstract: Ion imprinted polymers (IIPs) specific to lanthanides were synthesized using neodymium ions (Nd3+) as template ions. Nd3+ ions form binary complex ions with 5,7-dichloroquinoline-8-ol (DCQ) or vinylpyridine (VP), or ternary complex ions with both DCQ and VP in 2-methoxyethanol, before copolymerization in the presence of styrene and divinylbenzene as monomer and cross-linker, respectively. DCQ was expected to be trapped in the synthesized polymers pores. The template ion removal was then optimized. For the first time, the DCQ leakage was determined by HPLC-UV during the template removal and the sedimentation steps before solid-phase extraction (SPE) packing. It was observed that the trapped DCQ was unfortunately lost in significant amounts, up to 51%, and that this amount varied from one synthesis to another. The grinded and sieved polymers were next packed in SPE cartridges. The study of the SPE profiles obtained with the IIPs synthesized either with the binary or the ternary complex confirmed the prominent role of DCQ on the selectivity of an IIP by comparison with a non-imprinted polymer (NIP), i.e. a polymer synthesized under the same conditions as those of the IIP but without template ions. The influence of the porogenic solvent on the selectivity was also investigated by replacing 2-methoxyethanol by acetonitrile or dimethylsulfoxyde (DMSO). The polymers synthesized in DMSO led to the most repeatable results when elution solutions with a gradual decrease in pH were percolated through the cartridge. This is why DMSO was used to optimize the SPE protocol in order to maximize the difference of extraction yield between the IIP and the NIP, i.e. promoting a selective retention on the IIP. A value of about 30% was obtained for La3+, Ce3+, Nd3+, and Sm3+. Nevertheless, with the optimized SPE protocol, IIPs from different syntheses did not have the same SPE behavior, which may result from different random leakages of DCQ. This demonstrates for the first time the main limitation of the IIPs synthesized in bulk with the trapping approach for their use in SPE
Template and target information: neodymium ion, Nd(III), lanthanides
Author keywords: ion imprinted polymer, Trapping, Solid-Phase Extraction (SPE), lanthanides

  Periodic table Banana Split - the chemical formula for banana split shirt  Mug featuring the name Valerie spelled out in the single letter amino acid code  Meerkat somebody mention coffee mug

Molecules Special Issue call      Appeal for information


Join the Society for Molecular Imprinting
Logo of the Society for Molecular Imprinting

New items RSS feed
new items RSS feed  View latest updates

Sign-up for e-mail updates:
Choose between receiving an occasional newsletter or more frequent e-mail alerts.
Click here to go to the sign-up page.

Is your name elemental or peptidic? Enter your name and find out by clicking either of the buttons below!
Other products you may like:
view listings for MIP books on eBay:

Mickey Mouse 90th Anniversary banner