Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5402896 | Journal of Luminescence | 2009 | 7 Pages |
Abstract
The 2,6-pyridinedicarboxylic acid (PDA) has been shown to efficiently sensitize and enhance the fluorescence of uranium in aqueous medium. Interestingly, this ligand stabilizes the UO22+ species, which without the ligand is known to be in a negligible concentration, in aqueous medium at pH 6. The ligand sensitized enhancement of UO22+ fluorescence by PDA, provides an analytical tool for the determination of uranium at trace levels, in aqueous medium. Furthermore, PDA is also known to enhance the fluorescence of lanthanides; consequently, the simultaneous determination of uranium and lanthanides, using PDA as a fluorescence sensitizing agent, becomes a possibility, which has been demonstrated in this work. We have shown that the use of PDA yields detection limits of 2.2Ã10â7Â M for UO22+, 1Ã10â8Â M for Tb3+ and 5Ã10â9Â M for Eu3+ in the simultaneous determination of these analytes.
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Authors
S. Maji, K.S. Viswanathan,