Ultratrace determination of europium in high-purity lanthanum, praseodymium and dysprosium oxides by luminescence spectrometry

A luminescence spectrometric method was developed for the determination of ultra trace amounts of europium (down to 1 × 10 −13 M) in high purity lanthanum, praseodymium and dysprosium oxides. This is based on the enhanced luminescence of europium-thenoyltrifluoroacetone (TTA)-dibenzo-18-crown-6 (DBC...

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Bibliographic Details
Published in:Talanta (Oxford) 1997-03, Vol.44 (3), p.423-426
Main Authors: Sita, N.Mahalakshmi, Prasada^Rao, T., Iyer, C.S.P., Damodaran, A.D.
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Exact sciences and technology
Luminescence spectrometry
Rare earth oxides
Spectrometric and optical methods
Ultra trace quantities
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Summary:A luminescence spectrometric method was developed for the determination of ultra trace amounts of europium (down to 1 × 10 −13 M) in high purity lanthanum, praseodymium and dysprosium oxides. This is based on the enhanced luminescence of europium-thenoyltrifluoroacetone (TTA)-dibenzo-18-crown-6 (DBC)-Triton X-100 in the presence of terbium. The fluorescence intensity is linear with europium concentration in the range 1 × 10 −11 − 1 × 10 −6 M under the recommended conditions. The optimized procedure is successfully utilized for the determination of ultratrace amounts of europium in lanthanium, praseodymium and dysprosium oxides.
ISSN:0039-9140
1873-3573
DOI:10.1016/S0039-9140(96)02085-1