Journal
TALANTA
Volume 83, Issue 5, Pages 1329-1334Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2010.10.027
Keywords
Azo calix[4]arene; Ion selective electrode; Neodymium; PVC-membrane
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Funding
- UGC, New Delhi
- CDRI, Lucknow
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We found that the PVC membrane, containing azo calix[4]arene is a suitable ionophore, exhibited a Nernstian response for neodymium (Nd3+) ions (with slope of 19.8 +/- 0.2 mV decade(-1) for the triply charged ion) over a wide linear range of 4.0 x 10(-8) to 1.0 x 10(-1) mol L-1 with a detection limit 1.0 x 10(-8) mol L-1, a relatively fast response time, in the whole concentration range (<10 s), and a considerable life time at least for four months in the pH range of 4.0-8.0. Furthermore, the electrode revealed high selectivity with respect to all the common alkali, alkaline earth, transition and heavy metal ions, including the members of the lanthanide family other than Nd3+. Concerning its applications, it was effectively employed for the determination of neodymium ions in industrial waste water as well as in lake water. (C) 2010 Elsevier B.V. All rights reserved.
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