[Study the characteristics of dissolved organic matter and turbidity of water using laser induced fluorescence and laser scattering].

In the experiment a frequency doubled radiation of Nd:YAG laser was used for excitation at 532 nm. The fluorescence spectra of dissolved organic matter (DOM) and chlorophyll a (Chl-a) in several types of water samples with laser-induced fluorescence (LIF) measurements using a 532 nm wavelength excitation source were measured in the laboratory, and the spectral characteristics of DOM and Chl-a were analysed. The characteristics of turbidity were investigated by measuring the amount of scattering light of suspended particles in the water volume. The curve of scattering intensity against corresponding turbidity of SiO2 is showed. The possibilities of water quality monitoring based upon the fluorescence spectral characteristics of contaminations and the turbidity by means of LIF method.