Equilibrium studies on a fluorescence plastic thin film sensor for carbon dioxide

Andrew Mills; Qing Chang

doi:10.1117/12.144698

18 May 1993 Equilibrium studies on a fluorescence plastic thin film sensor for carbon dioxide

Andrew Mills, Qing Chang

Proceedings Volume 1885, Advances in Fluorescence Sensing Technology; (1993) https://doi.org/10.1117/12.144698
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States

Abstract

The method of preparation of a novel plastic thin film sensor which incorporates the fluorescent dye, 8-hydroxy, 1,3,6 pyrene trisulfonic acid is described; the shelf-life of the film is over 6 months. The results of a study of the equilibrium response of the sensor towards different levels of gaseous CO₂ fit a model in which there is a 1:1 equilibrium reaction between the deprotonated form of the dye (present in the film as an ion pair) and the level of CO₂ the film is exposed to. The 0 - 90% response time of the film when exposed to an alternating atmosphere of air and 5% CO₂ is typically less than 3 s. The response of the film towards a random variation in %CO₂ as a function of time compares favorably with that observed at the same time using an infra-red detector.

Citation Download Citation

Andrew Mills and Qing Chang "Equilibrium studies on a fluorescence plastic thin film sensor for carbon dioxide", Proc. SPIE 1885, Advances in Fluorescence Sensing Technology, (18 May 1993); https://doi.org/10.1117/12.144698

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