A novel fluorescence reagent, 10-hydroxybenzo[h]quinoline-7-sulfonate, for selective determination of beryllium(II) ion at pg cm-3 levels

H. Matsumiya, H. Hoshino, T. Yotsuyanagi

Research output: Contribution to journalArticle

35 Citations (Scopus)

Abstract

A facile method has been developed for the highly sensitive and selective determination of ultratrace Be(II) ion using a new fluorimetric reagent, 10-hydroxybenzo[h]quinoline-7-sulfonate (HBQS), under extremely alkaline conditions, at pH 12.0. This reagent is quite suitable for the very small ion, Be(II), to form a 6-membered chelate ring, compatible with a high fluorescence yield. The stoichiometry of the chelate is 1:1 for Be-HBQS at pH 12.0. The calibration graph gave a wide linear dynamic range, 2-100 nmol dm-3 of Be(II) ion with the detection limit (3s blank) of 0.52 nmol dm-3, or 4.7 pg cm-3. The excellent sensitivity and toughness toward the matrix influence were demonstrated using the artificial sample solutions for air-dust. Coupled with the simple masking procedure using EDTA, the method enables one to determine Be(II) ion at nanomolar levels in the presence of metals at the natural abundance levels in air-dust samples, typically Al, Ca, Cu, Fe, Mg, Pb, and Zn at 130, 150, 1.0, 70, 33, 3.0, and 8.0 μmol dm-3, respectively, in the final solution. The proposed method was successfully applied to the determination of Be in urban air.

Original languageEnglish
Pages (from-to)2082-2086
Number of pages5
JournalAnalyst
Volume126
Issue number11
DOIs
Publication statusPublished - 2001 Jan 1

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Environmental Chemistry
  • Spectroscopy
  • Electrochemistry

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