TRENDS IN POLYMERIC SORBENTS FOR SOLID-PHASE EXTRACTION
Authors: N. Fontanals, R.M. Marcé, F. Borrull, University Rovira i Virgili, Department of Analytical Chemistry and Organic Chemistry, Tarragona, Spain
Abstract: This chapter provides an overview of the new developments in polymeric material that improve the solid-phase extraction of analytes from liquid samples. We mainly focus on the new polymeric sorbents, both commercially available and ―in-house‖ synthesized, with enhanced properties to suitable extract analytes from aqueous samples. We cover different types of polymeric sorbents, from those that improve the capacity in the extraction process (namely hypercrosslinked sorbents, with large specific surface area and balanced hydrophilicity) to those that improve the selectivity in the extraction process (namely molecularly imprinted polymers –MIPs- synthesized with a specific cavity for the analyte of interest) and also those with combined properties (namely mixed-mode sorbents, which are ―high-capacity‖ sorbent with an ion-exchange moiety that tune the selectivity in the extraction process). We describe the synthetic approach, the morphological and chemical properties of all these sorbents in order to better understand them and relate them to their capability of retaining target compounds. We also present and compare the results provided when these sorbents are applied as sorptive material to extract analytes in different liquid matrices in the most relevant analytical fields.