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<p>The laser-induced fluorescence of oxygen in organic solvents was investigated as a potential contactless method for quantifying its concentration. The fluorescence was excited directly by a diode laser radiation in the 1270 nm oxygen absorption band. Neither a sensitizer nor singlet oxygen traps were added to the solvent. An uncooled photodiode was used as a detector. A simple kinetic model was used for assessing the oxygen concentration from the signal magnitude and decay time. An advanced model explaining the observed deviation of fluorescence kinetics from single exponential decay is presented. The method was tested with pure and contaminated Freon-113 samples, chloroform, acetone and n-heptane.</p>

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Exploring the laser-induced fluorescence of dissolved oxygen as a method for its contactless detection

  • 期刊论文

  • 发表日期：

    2025年11月26日

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  • Anatoliy A. Kosterev

摘要

The laser-induced fluorescence of oxygen in organic solvents was investigated as a potential contactless method for quantifying its concentration. The fluorescence was excited directly by a diode laser radiation in the 1270 nm oxygen absorption band. Neither a sensitizer nor singlet oxygen traps were added to the solvent. An uncooled photodiode was used as a detector. A simple kinetic model was used for assessing the oxygen concentration from the signal magnitude and decay time. An advanced model explaining the observed deviation of fluorescence kinetics from single exponential decay is presented. The method was tested with pure and contaminated Freon-113 samples, chloroform, acetone and n-heptane.