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Abstract: Benzophenone-4 (BP4) is an emerging pollutant coming from sunscreens, which is environmentally harmful and has been widely detected in aquatic systems. Measurement of trace amounts of BP4 in the environment requires a pre-concentration of BP4 by Solid Phase Extraction (SPE).The present paper aims at the development ofBP4 selective solid adsorbents based on polyaniline (PANI) material for their implementation into SPE. Selective binding of BP4 relies on molecularly imprinted polymers (MIP). Three quite different technologies are first compared in order to select to most suitable regarding criteria pertaining to application to SPE: (i) simple oxidative polymerization of aniline in the presence of BP4 acting as a template; (ii) polymerization of aniline onto the surface of a silica support in presence of template; (iii) copolymerization of free aniline with aniline bound to the surface of silica that ensures chemical attachment of PANI to the solid support. Evidence of definite benefits of the formation of PANI as thin films chemically bound to the surface of classical silica solid phases of SPE cartridges is given. The binding process of PANI to aniline-grafted silica is optimized with respect to binding of BP4. Finally, analytical performances of the new materials are given
Template and target information: benzophenone-4, BP4
Author keywords: molecularly imprinted polymer, polyaniline, selective adsorption, Benzophenone-4