Chemically selective optode membranes casted on multiple internal reflection elements of high-refractive index

Daniel Freiner; Ursula E. Spichiger-Keller

doi:10.1117/12.168752

15 February 1994 Chemically selective optode membranes casted on multiple internal reflection elements of high refractive index

Daniel Freiner, Ursula E. Spichiger-Keller

Author Affiliations +

Proceedings Volume 2085, Biochemical and Medical Sensors; (1994) https://doi.org/10.1117/12.168752
Event: Europto Biomedical Optics '93, 1993, Budapest, Hungary

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.

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Daniel Freiner and Ursula E. Spichiger-Keller "Chemically selective optode membranes casted on multiple internal reflection elements of high refractive index", Proc. SPIE 2085, Biochemical and Medical Sensors, (15 February 1994); https://doi.org/10.1117/12.168752

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