Fig. 4. Fluorescence emission spectra, using an excitation wavelength of 350 nm, recorded in (a) 3.768 ± 0.009 mM CTAB (b) 36.893 ± 0.015 mM SDS and (c) 2.827 ± 0.012 mM TX-100 aqueous solutions added with different quercetin concentrations at (28.0 ± 0.1) °C and the pH 7 ± 0.2. The respective calibration plots are also show at the right of each spectra family. In these plots the fluorescence intensity of the corresponding surfactant aqueous solution without quercetin was subtracted. The error bars were estimated from at least 5 repetitions.
