TY - JOUR
T1 - Selective recognition of arsenic by tailoring ion-imprinted polymer for ICP-MS quantification
AU - Tsoi, Yeuk Ki
AU - Ho, Yee Man
AU - Leung, Kelvin Sze Yin
N1 - Funding Information:
Y.-K. Tsoi and Y.-M. Ho gratefully acknowledges their receipts of postgraduate studentships from the University Grants Council. K.S.-Y. Leung thanks the General Research Fund (HKBU 201210), Research Grant Council, Hong Kong and the Environment and Conservation Fund (ECF 25/2009) of the Environmental Protection Department for financial support.
PY - 2012/1/30
Y1 - 2012/1/30
N2 - 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 μmol g-1). The robust As-IIP 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 μmol L-1, respectively, for environmental sample analysis using inductively coupled plasma-mass spectrometry.
AB - 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 μmol g-1). The robust As-IIP 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 μmol L-1, respectively, for environmental sample analysis using inductively coupled plasma-mass spectrometry.
KW - Arsenic
KW - Inductively coupled plasma-mass spectrometry
KW - Ion recognition
KW - Ion-imprinted polymer
KW - Solid-phase extraction
UR - http://www.scopus.com/inward/record.url?scp=84856358893&partnerID=8YFLogxK
U2 - 10.1016/j.talanta.2011.12.007
DO - 10.1016/j.talanta.2011.12.007
M3 - Journal article
AN - SCOPUS:84856358893
SN - 0039-9140
VL - 89
SP - 162
EP - 168
JO - Talanta
JF - Talanta
ER -