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Photoluminescence of traces of aromatic compounds in aqueous solutions upon excitation by a repetitively pulsed laser

  • Molecular Spectroscopy
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Abstract

A method is suggested for quantitative and qualitative analysis of aromatic compounds in water at extremely low concentrations (<1 ng/l). The method is based on excitation of luminescence by short (20 ns) UV laser pulses with a peak power of 104 W at 255.3 nm and a pulse repetition rate of 10 kHz. The shape of luminescence spectra of benzene, benzoic acid, saccharin, aspirin, and L-tryptophan at low concentrations in water is analyzed. The luminescence kinetics of these compounds is studied at short delay times (10–20 ns). The lifetimes of the electronic excited states of the aromatic compounds are measured. The applications of the method for studies of low-concentration aqueous solutions of biological and medicine compounds are analyzed.

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Authors and Affiliations

  1. Lebedev Physics Institute, Russian Academy of Sciences, Moscow, 117924, Russia

    A. M. Agal’tsov, V. S. Gorelik & R. A. Moro

Authors
  1. A. M. Agal’tsov
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  2. V. S. Gorelik
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  3. R. A. Moro
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Translated from Optika i Spektroskopiya, Vol. 88, No. 6, 2000, pp. 954–960.

Original Russian Text Copyright © 2000 by Agal’tsov, Gorelik, Moro.

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Agal’tsov, A.M., Gorelik, V.S. & Moro, R.A. Photoluminescence of traces of aromatic compounds in aqueous solutions upon excitation by a repetitively pulsed laser. Opt. Spectrosc. 88, 868–874 (2000). https://doi.org/10.1134/1.626892

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  • DOI: https://doi.org/10.1134/1.626892

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