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Proceedings Paper

Chemically selective optode membranes casted on multiple internal reflection elements of high-refractive index
Author(s): Daniel Freiner; Ursula E. Spichiger-Keller
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Paper Abstract

Measurements of calcium ion activities with lately available Schott glass `LaSF35' as the multiple internal reflection element are presented. Use of the evanescent wave in absorption mode as well as corresponding data for the refractive index are shown. Looking from the backside at the membrane eliminates optical sample interferences and the crucial assumption of a homogeneous bulk optode can be verified by profiling into a controlled depth of the membrane.

Paper Details

Date Published: 15 February 1994
PDF: 7 pages
Proc. SPIE 2085, Biochemical and Medical Sensors, (15 February 1994); doi: 10.1117/12.168752
Show Author Affiliations
Daniel Freiner, Swiss Federal Institute of Technology (United Kingdom)
Ursula E. Spichiger-Keller, Swiss Federal Institute of Technology (Switzerland)

Published in SPIE Proceedings Vol. 2085:
Biochemical and Medical Sensors
Otto S. Wolfbeis, Editor(s)

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