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Proceedings Paper

Application of a fluorescence intensity ratio technique for the intrinsic determination of pH using an optical fiber sensor
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Paper Abstract

An intensity ratio technique has been used for characterizing fluorescence spectra from novel coumarin dyes for pH sensing, in the range of 0.5 – 6, providing results that are independent of possible fluctuations in the intensity of the excitation source, deterioration of the indicator and changes in optical coupling. The arrangement was determined to have a sensitivity of 25% per unit pH change (at a pH of 4).

Paper Details

Date Published: 28 September 2015
PDF: 4 pages
Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96344M (28 September 2015); doi: 10.1117/12.2195314
Show Author Affiliations
Bhadra Thotath, Victoria Univ. (Australia)
T. Hien Nguyen, City Univ. London (United Kingdom)
Weiwei Zhang, Nanchang Hangkong Univ. (China)
Stephen P. Wren, City Univ. London (United Kingdom)
Gregory W. Baxter, Victoria Univ. (Australia)
Tong Sun, City Univ. London (United Kingdom)
Stephen F. Collins, Victoria Univ. (Australia)
Kenneth T. V. Grattan, City Univ. London (United Kingdom)

Published in SPIE Proceedings Vol. 9634:
24th International Conference on Optical Fibre Sensors
Hypolito José Kalinowski; José Luís Fabris; Wojtek J. Bock, Editor(s)

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