A novel optical sensor for uranium determination |
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Authors: | Afsaneh Safavi Mozhgan Bagheri |
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Institution: | Department of Chemistry, College of Sciences, Shiraz University, Hafezieh, Shiraz 71454, Iran |
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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) × 10−5 M of UO22+ ions with a limit of detection of 5 × 10−6 M. The response time of optode was within 6 min depending on the concentration of UO22+ ions. The sensor can readily be regenerated with hydrochloric acid solution (0.01 M). The optode is fully reversible. |
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Keywords: | Uranium Optode Alizarin Red S |
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