Fluorometric Determination of Trace Amounts of Fluoride Ion Using an Expanded Porphyrin

M. Tabata, K. Kaneko, Y. Murakami, Y. Hisaeda, H. Mimura

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A highly selective and sensitive method of fluorometry is described for determination of the fluoride ion at the parts per billion level via the ion-pair complex formation of the fluoride ion with an expanded prophyrin [2,23-diethyl-8,17-bis(2-ethoxycarbonylethyl)-3,7,12,13,18,22-hexamethyl sapphyrin (H3sap)]. The ion-pair complex gives out an enhanced fluorescence intensity at 680 nm on excitation at 450 nm. Since the present method is based on a direct reaction of the fluoride ion with the sappyrin, a 200-fold amount of the aluminum (III) ion [10-4M (M = mol dm-3)] and a 2000-fold amount of the iron(III) ion (10-3M) over the fluoride ion did not interfere with determination of the fluoride ion at concentrations as low as 5 × 10-7M in the presence of 1,2-diaminocyclohexane-N,N,N′,N′-teraacetic acid. The proposed method was applied to determination of the fluoride ion in various water samples (tap water, river water, rain water, underground water, and hot spring water) and satisfactory results were obtained.

Original languageEnglish
Pages (from-to)136-144
Number of pages9
JournalMicrochemical Journal
Volume49
Issue number2-3
DOIs
Publication statusPublished - Apr 1 1994

Fingerprint

Porphyrins
Fluorides
Ions
Water
Hot springs
Springs (water)
Aluminum
Rain
Groundwater
Iron
Rivers
Fluorescence
Acids

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Spectroscopy

Cite this

Fluorometric Determination of Trace Amounts of Fluoride Ion Using an Expanded Porphyrin. / Tabata, M.; Kaneko, K.; Murakami, Y.; Hisaeda, Y.; Mimura, H.

In: Microchemical Journal, Vol. 49, No. 2-3, 01.04.1994, p. 136-144.

Research output: Contribution to journalArticle

Tabata, M. ; Kaneko, K. ; Murakami, Y. ; Hisaeda, Y. ; Mimura, H. / Fluorometric Determination of Trace Amounts of Fluoride Ion Using an Expanded Porphyrin. In: Microchemical Journal. 1994 ; Vol. 49, No. 2-3. pp. 136-144.
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