28 September 2015 Application of a fluorescence intensity ratio technique for the intrinsic determination of pH using an optical fiber sensor
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Proceedings Volume 9634, 24th International Conference on Optical Fibre Sensors; 96344M (2015) https://doi.org/10.1117/12.2195314
Event: International Conference on Optical Fibre Sensors (OFS24), 2015, Curitiba, Brazil
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).
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Bhadra Thotath, Bhadra Thotath, T. Hien Nguyen, T. Hien Nguyen, Weiwei Zhang, Weiwei Zhang, Stephen P. Wren, Stephen P. Wren, Gregory W. Baxter, Gregory W. Baxter, Tong Sun, Tong Sun, Stephen F. Collins, Stephen F. Collins, Kenneth T. V. Grattan, Kenneth T. V. Grattan, } "Application of a fluorescence intensity ratio technique for the intrinsic determination of pH using an optical fiber sensor", Proc. SPIE 9634, 24th International Conference on Optical Fibre Sensors, 96344M (28 September 2015); doi: 10.1117/12.2195314; https://doi.org/10.1117/12.2195314
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