Laser spectrofluorometry of humic substances conformational transformation in water

Nicolai A. Nemkovich; Anna P. Golovach; Alexander S. Kozlovsky; Ivan I. Lishtvan; Anatoly Nikolaevich Rubinov

doi:10.1117/12.221091

21 September 1995 Laser spectrofluorometry of humic substances conformational transformation in water

Nicolai A. Nemkovich, Anna P. Golovach, Alexander S. Kozlovsky, Ivan I. Lishtvan, Anatoly Nikolaevich Rubinov

Proceedings Volume 2503, Air Toxics and Water Monitoring; (1995) https://doi.org/10.1117/12.221091
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

Conformational transformation of dissolved humic substances induced by acidic and basic additives in water has been investigated by automated subnanosecond laser spectrofluorimeter and fluorescent probe method. The equilibrium constants for binding of rhodamine 6G to dissolved humic substances in water have been determined by a fluorescence quenching method. It is shown that the conformational structure of humic compounds in water depends on the intra- and intermolecular interactions. Spectral and viscosimetrical data in pH region 1.5-12.0 are interpreted in terms of conformational transformation of dissolved humic substances from a rigid globule to a flexible chain.

Citation Download Citation

Nicolai A. Nemkovich, Anna P. Golovach, Alexander S. Kozlovsky, Ivan I. Lishtvan, and Anatoly Nikolaevich Rubinov "Laser spectrofluorometry of humic substances conformational transformation in water", Proc. SPIE 2503, Air Toxics and Water Monitoring, (21 September 1995); https://doi.org/10.1117/12.221091

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