By Ph.D. Núñez Oscar, Ph.D. Lucci Paolo
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World—Trends Pestic. In: New Trends in Sample Preparation Techniques Editors: Oscar Núñez and Paolo Lucci ISBN: 978-1-63485-072-8 © 2016 Nova Science Publishers, Inc. Chapter 2 APPLICATION OF MOLECULARLY IMPRINTED POLYMERS TO SOLID-PHASE EXTRACTION IN FOOD ANALYSIS Paolo Lucci1,* and Oscar Núñez2,3,4 1 Department of Agri-Food, Animal and Environmental Sciences, University of Udine, Udine, Italy 2 Department of Analytical Chemistry, University of Barcelona, Barcelona, Spain 3 Research Institute in Food Nutrition and Food Safety, University of Barcelona, Barcelona, Spain 4 Serra Húnter Fellow, Generalitat de Catalunya, Spain ABSTRACT In spite of the huge development of analytical instrumentation during last two decades, sample preparation remains a crucial part of the whole analytical process since effective sample preparation is still essential for achieving satisfactory analytical results.
J. Sep. Sci. 37, 99–105. , 2004, Large-scale fabrication of aligned single-walled carbon nanotube array and hierarchical single-walled carbon nanotube assembly. J. Am. Chem. Soc. 126, 16698–9. , 2014, Application of Electrospun Polystyrene Nanofibers as Solid Phase Extraction Sorbent for the Preconcentration of Diazinon and Fenitrothion in Environmental Waters. J. Liq. Chromatogr. Relat. Technol. 38, 208–214. , 2008, Electrospun polymer nanofibers as a solid-phase extraction sorbent for the determination of trace pollutants in environmental water.
Common cross-linkers used in molecular imprinting procedures. 32 Paolo Lucci and Oscar Núñez The bulk polymer is obtained by carefully mixing the template molecule, monomer, cross-linker and initiator in a proper solvent (also known as “porogen”) followed by UV radiation or temperature-induced polymerization step. , 25-50 µm). Thereafter, these particles must be extensively washed to remove the template . This washing procedure is very tedious and can be very time and solvent-consuming but it is of primary importance for revealing the imprinted cavities and minimizing the bleeding of the template that may cause false-positive results when using MIPs as selective sorbents for SPE in trace analysis.