MIPs logo MIPdatabase      Use this space
Custom Search
Reference type: Journal
Authors: Valero-Navarro A, Medina-Castillo AL, Fernandez-Sanchez JF, Fernández-Gutiérrez A
Article Title: Synthesis of a novel polyurethane-based-magnetic imprinted polymer for the selective optical detection of 1-naphthylamine in drinking water.
Publication date: 2011
Journal: Biosensors and Bioelectronics
Volume: 26
Issue: (11)
Page numbers: 4520-4525.
DOI: 10.1016/j.bios.2011.05.013
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0956566311002867

Abstract: The first polyurethane based magnetic-MIP for the selective detection of 1-naphthylamine (1-NA) in drinking water has been synthesised. The synthesis has been carried out in a two-step process: first, the incorporation of magnetite-coated-oleic acid nanoparticles (γ-Fe3O4-OA) into a lipophilic polymeric matrix (poly-MMA-co-EDMA) and second, the encapsulation of these magnetic seeds into the MIP structure by precipitation polymerisation. The mag-MIP was first RHTEM imaged showing a well-organised material with magnetite within the material and the imprinted polymer coating the magnetic core. Thereafter, it was evaluated by batch rebinding analysis and the derived Freundlich isotherm, calculating the number of binding sites (NKmin-Kmax=2.63 and 0.79 mmol g-1, for mag-MIP and mag-NIP, respectively) and apparent average adsorption constant (KKmin-Kmax=3.31 and 3.06 mmol-1, for mag-MIP and mag-NIP, respectively) showing a very effective imprinting process. We have also developed a magnetic optical sensor MIP by using an optical fiber coupled with a magnetic separator. An unexpected selectivity for 1-NA was revealed allowing the detection of this molecule in water, even in the presence of 4 structurally related compounds (2-naphthylamine, 1-naphthol, 2-naphthol and 1-naphthalenemethylamine), with a low limit of detection (LOD) = 18 ng mL-1. Finally, we applied this new hybrid material to the analysis of 1-NA in tap and mineral waters, obtaining a 91.6% average recovery rate
Template and target information: 1-naphthylamine, 1-NA
Author keywords: Molecularly imprinted polymers, precipitation polymerisation, polyurethane, 1-Naphthylamine, water analysis


  Template of Doom spoof movie poster bag  Chemistry peptide mug  Chemists are fun customisable shirt

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