Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10528752 | Analytica Chimica Acta | 2005 | 6 Pages |
Abstract
A metal ion indicator, Alizarin Red S, was tested for its potential use in uranium selective optode membrane. The water-soluble indicator was lipophilized in the form of an ion pair with tetraoctylammonium bromide, and subsequently immobilized on a triacetyl cellulose membrane. The membrane responds to uranium ions, giving a color change from yellow to violet in acetate buffer pH 5. This optode has a linear range of (1.70-18.7) Ã 10â5Â M of UO22+ ions with a limit of detection of 5 Ã 10â6Â M. The response time of optode was within 6Â min depending on the concentration of UO22+ ions. The sensor can readily be regenerated with hydrochloric acid solution (0.01Â M). The optode is fully reversible.
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Analytical Chemistry
Authors
Afsaneh Safavi, Mozhgan Bagheri,