... Abstract The fluorescent dyes fluoresceine disodium, eosin Y, rhodamine B, rhodamine 6G and amino-G acid were chosen for the investigation. Their absorption, excitation and fluorescence spectra in aqueous media at different pH values were recorded on a Fluorat-02-Panorama spectrofluorimeter and the maxima of excitation and emission for individual compound were established. ... Moscow University Chemistry Bulletin . 2014, Vol. ... 5, P. 281 . ... Moscow State University, 2002 . ...