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Fresenius' Zeitschrift für analytische Chemie

, Volume 334, Issue 1, pp 37–40 | Cite as

Highly sensitive spectrofluorometry of europium(III) as its benzoyltrifluoroacetone complex with trioctylphosphine oxide by means of solvent extraction and vacuum sublimation

  • E. Shirakawa
  • T. Honjo
  • K. Terada
Original Papers Spectrofluorometric Analyses

Summary

A new method for the highly sensitive fluorometric determination of europium(III) as its benzoyltrifluoroacetone (BFA) complex with trioctylphosphine oxide (TOPO) without uncombined BFA in n-hexane has been established by means of solvent extraction and vacuum sublimation. The effect of various factors on the fluorescence intensity of europium(III) was investigated. The fluorescence intensity was measured at 620 nm against rhodamine B as an internal standard under the excitation at 335 nm. It was found that a heating treatment gave rise to the enhancement of the fluorescence intensity for about twice times compared with that without heating treatment. Excellent linearity of the calibration curve of europium(III) was obtained in the range of 0–100 ppb. A few ppb of europium(III) can still be detected with this method. All 13 rare earth metals and cobalt(II) tested gave a somewhat positive error. Aluminium(III), iron(III), and copper(II) caused a negative error. The interference of aluminium(III) and iron(III) was removed by extraction with 0.1 mol/l 8-quinolinol in chloroform at pH 4.0, while the problem of cobalt(II) and copper(II) was solved by masking with 0.1 mol/l Na2S2O3 in aqueous solution.

Keywords

Europium Cobalt Fluorescence Intensity Solvent Extraction Rhodamine 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Hochempfindliche spektrofluorimetrische Bestimmung von Europium(III) als Benzoyltrifluoracetonkomplex mit Trioctylphosphinoxid mit Hilfe der Lösungsextraktion und Vakuumsublimation

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References

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    Shigematsu T, Matsui M, Sumida T (1968) Bull Inst Chem Res Kyoto Univ 46:248Google Scholar
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    Honjo T (1980) Bunseki 1980:800Google Scholar
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    Honjo T, Nukui K (1986) Bull Chem Soc Jpn 59:2645Google Scholar
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    Cit YX, Lan ZH (1988) Analyst 113:1453Google Scholar

Copyright information

© Springer-Verlag 1989

Authors and Affiliations

  • E. Shirakawa
    • 1
  • T. Honjo
    • 1
  • K. Terada
    • 1
  1. 1.Department of Chemistry, Faculty of ScienceKanazawa UniversityKanazawaJapan

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