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Proceedings Paper

Contributions to potassium and ammonium ion-selective optodes based on valinomycin, nonactin, and 1,1-dimethylsila-20-crown-7
Author(s): Juergen Polster; G. Prestel; M. Wollenweber; P. Czerney
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Paper Abstract

Valinomycin, nonactin and 1,1-dimethylsila-20-crown-7 are well known complexing agents for potassium and ammonium ions. Membrane optodes, based on these ion-selective carriers and appropriate chromoionophores, were produced and spectroscopically investigated in the range of 350-700 nm. The spectra of optodes obtained under flow injection analysis conditions were monitored in dependence on time. The calibration curves for potassium and ammonium ions were registered for each optode. The results clearly demonstrate that all tested optodes are both similarly sensitive to K+ and NH4+. Thus, biological fluids can not be analyzed simply by the individual calibration curves when the solutions contain similar amounts of K+ and NH4+.

Paper Details

Date Published: 29 September 1995
PDF: 10 pages
Proc. SPIE 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII, (29 September 1995); doi: 10.1117/12.221748
Show Author Affiliations
Juergen Polster, Technischen Univ. Muenchen (Germany)
G. Prestel, Technischen Univ. Muenchen (Germany)
M. Wollenweber, Technischen Univ. Muenchen (Germany)
P. Czerney, Friedrich-Schiller-Univ. Jena (Germany)

Published in SPIE Proceedings Vol. 2508:
Chemical, Biochemical, and Environmental Fiber Sensors VII
Annamaria V. Scheggi, Editor(s)

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