Journal
TALANTA
Volume 89, Issue -, Pages 162-168Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2011.12.007
Keywords
Arsenic; Ion-imprinted polymer; Ion recognition; Solid-phase extraction; Inductively coupled plasma-mass spectrometry
Categories
Funding
- University Grants Council
- General Research Fund [HKBU 201210]
- Research Grant Council
- Environmental Protection Department [ECF 25/2009]
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A novel arsenic-ion imprinted polymer (As-IIP) was firstly synthesized for the separation and recovery of trace elemental As from environmental water samples. Polymers prepared from bifunctional monomers with intrinsic metal-binding capability are a platform for tailoring ion-selectivity via imprinting moiety-template interaction, without complex formation and ligand immobilization. In the present study, As-IIPs based on 1-vinylimidazole, 4-vinylpyridine and styrene were designed to investigate the imprinting mechanism in relation to their structural and functional properties. In terms of selectivity as well as imprinting effects compared with the non-imprinted polymer (NIP), 1-vinylimidazole-based As-IIP exhibited superior analyte recognition for As ion among 23 competing elements, with a 25-fold enhancement in the practical dynamic and static adsorption capacity range (0.048-4.925 mu mol g(-1)). The robust As-TIP sorbent features good reusability up to 20 cycles and a wide working pH 5-7 for a firstly reported solid-phase extraction (SPE) application. As a result of selective sample clean-up. As-IIP-SPE offered limits of detection (LOD) and quantification (LOQ) down to 0.025 and 0.083 mu mol L-1, respectively, for environmental sample analysis using inductively coupled plasma-mass spectrometry. (C) 2011 Elsevier B.V. All rights reserved.
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