Chromo- and fluoroionophores based on diaza-crown ethers for alkaline earth metal ions

Timothy L. Blair, Jayant Desai, Leonidas G Bachas

Research output: Contribution to journalArticle

10 Scopus citations

Abstract

Two new metal-selective dyes were synthesized and used to develop methods for determining Ca2+ and Mg2+. A chromogenic diaza-18-crown-6 with an alizarin group at each crown nitrogen is a calcium-selective ionophore used for extraction-spectrophotometry. The detection limit for the technique is 1 x 10-5 M Ca2+. Fluorometric determination of Mg2+ is performed using a diaza-15-crown-5 derivatized with two methylumbelliferone groups. This method allows for the one-phase determination of Mg2+ down to 7 x 10-6 M.

Original languageEnglish (US)
Pages (from-to)1823-1834
Number of pages12
JournalAnalytical Letters
Volume25
Issue number10
DOIs
StatePublished - Oct 1 1992
Externally publishedYes

Keywords

  • calcium
  • chromoionophore
  • fluoroionophore
  • magnesium

ASJC Scopus subject areas

  • Analytical Chemistry
  • Biochemistry
  • Spectroscopy
  • Clinical Biochemistry
  • Biochemistry, medical
  • Electrochemistry

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