Analyte-selective optode membranes and optical evaluation techniques: characterization of response behavior by ATR measurements

Ursula E. Spichiger; D. Citterio; M. Bott

doi:10.1117/12.221731

29 September 1995 Analyte-selective optode membranes and optical evaluation techniques: characterization of response behavior by ATR measurements

Ursula E. Spichiger, D. Citterio, M. Bott

Author Affiliations +

Proceedings Volume 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII; (1995) https://doi.org/10.1117/12.221731
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

A variety of analyte-selective bulk membranes for use in optodes have been developed. They combine effectively with various optical transducers and detection techniques. Although the working principles of these membranes differ, the basic principle is a diffusion-limited exchange of the analyte between sample solution and optical bulk membrane. The thickness and viscosity of the membranes govern the diffusion and, therefore, the response time of the sensor. In accord with analytical requirements, the specifications of optode membranes can be predicted from measurements of the overall diffusion coefficients in the membrane phase. The ATR-approach is shown to be an attractive technique for such investigations.

Citation Download Citation

Ursula E. Spichiger, D. Citterio, and M. Bott "Analyte-selective optode membranes and optical evaluation techniques: characterization of response behavior by ATR measurements", Proc. SPIE 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII, (29 September 1995); https://doi.org/10.1117/12.221731

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