Ismail M.M. Rahman, Yoshiaki Furusho, Zinnat A. Begum, Akhmad Sabarudin, Shoji Motomizu, Teruya Maki, Hiroshi Hasegawa
A simple flow-based method was developed for the simultaneous separation of certain transition metal ions (Co, Ni, Cu, Zn, Cd) from aqueous systems, which ions show ecotoxic effects when present at elevated concentrations. A silica-gel-bonded macrocycle system, commonly known as molecular recognition technology (MRT) gel, was used for solid phase extraction (SPE) of the target analytes. The collection behavior of the MRT-SPE system was studied based on pH. Fortified deionized water samples containing 250 ìg L-1 of each of the elements were treated at the flow rate of 1 mL min-1. The collected analytes were then eluted by 3 M HNO3 and analyzed using inductively coupled plasma spectrometry. Detection limits of the proposed technique were in the range of 0.004-0.040 ìg L-1 for the studied metal ions. The validity of this separation technique was checked with spiked 'real' water samples, which produced satisfactory recoveries of 96-102%. The non-destructive nature and highly selective ion-extraction capability of the SPE material are the most important aspects of the proposed method and they are the main focus of this paper. © Versita Sp. z o.o.
Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan; Department of Chemistry, Faculty of Science, University of Chittagong, Chittagong 4331, Bangladesh; GL Sciences Inc., Shinjuku, Tokyo 163-1130, Nishishinjuku 6-22-1, Japan; Division of Nanomaterial Science, EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Japan; Department of Chemistry, Faculty of Science, Brawijaya University, Jl. Veteran Malang 65145, Indonesia; Graduate School of Natural Science and Technology, Okayama University, Okayama 700-8530, Tsushimanaka 3-1-1, Japan
