All measurements were performed by Instant Screener Compact
(ISC) analyser (LDI AS, Estonia). The optical system of ISC is aimed
to induce the fluorescence of the sample in front-face mode by
monochromatic light at different wavelength in spectral rangefrom 230 to 350 nm with 5 nm step and record the spectrum of
fluorescence in spectral range from 250 to 565 nm by detector.
For fluorescence excitation 5W pulse Xe-lamp is used. The time
of SFS matrix measurement is less than one minute. By default
the SFS matrix consists of 25 fluorescence emission spectra. Every
fluorescence emission spectrum in the SFS matrix is normalised by
the reference channel signal to correct the fluorescence intensity
on the spectral distribution of lamp and eliminate it’s possible
fluctuations