Fluorometric determination of fluoride ion by reagent tablets containing 3-hydroxy-2′-sulfoflavone and zirconium(IV) ethylenediamine tetraacetate

Hideyuki Matsunaga, Chiaki Kanno, Hironori Yamada, Yukiko Takahashi, Toshishige M. Suzuki

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

A reagent tablet for determination of fluoride ion has been prepared using ethylenediamine-N,N,N′,N′-tetraacetate complex of zirconium (Zr-EDTA), 3-hydroxy-2′-flavone (FS) and an appropriate pH buffer. Dissolving of the tablet into water exhibits an intense blue fluorescence (λmax = 460 nm) upon excitation at 377 nm and the fluorescence intensity decreases with the presence of fluoride ion. Hence, a simple fluorescent detection procedure for fluoride ion in aqueous media was successfully constructed with this tablet. The principle of this detection system is the ligand exchange reaction of FS bound to Zr-EDTA with fluoride ion. The present system provides an easy, rapid and selective determination method of fluoride ion ranging from 5 × 10-6 to 1 × 10 -3 mol dm-3. The measurement of real samples with this tablet showed the similar results as those by the common method with the Alfusone reagent.

Original languageEnglish
Pages (from-to)1000-1004
Number of pages5
JournalTalanta
Volume68
Issue number3
DOIs
Publication statusPublished - 2006 Jan 15
Externally publishedYes

Keywords

  • Fluoride ion
  • Fluorometric determination
  • Ligand exchange
  • Reagent tablets
  • Simple method

ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemistry(all)
  • Biochemistry
  • Spectroscopy

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