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Photoluminiscence response of Ru(II) complex immobilized in SiO2-based matrix to dissolved oxygen in beer.

Authors
  • Anastasova, S
  • Milanova, M
  • Todorovsky, D
Type
Published Article
Journal
Journal of Biochemical and Biophysical Methods
Publisher
Elsevier
Publication Date
Apr 24, 2008
Volume
70
Issue
6
Pages
1292–1296
Identifiers
PMID: 17976732
Source
Medline
License
Unknown

Abstract

The possibility to use the photoluminescence of Ru(II) tris(4,7-diphenyl-1,10-phenathroline) dichloride, immobilized in sol-gel produced SiO2-based matrix for the determination of dissolved oxygen concentration in beer is studied. Organically-modified silane (octyltriethoxysilane) and mixtures from tetraethoxysilane and octyltriethoxysilane are used as precursors for matrix production. Spin- and dip-coating techniques are applied for films deposition. The predeposition ultrasound treatment of the sol ensures a good sensitivity and a linear sensor quenching response to oxygen in 1/6 ppm O2-concentration interval. The CO2 present practically has no effect on the films performance. Their photoluminescence show rather good stability on prolonged storage in beer.

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