ABSTRACT
The fluorimetric and photometric properties were studied in water samples collected from the city river Okhta and the countryside river Oredezh. The Okhta water had higher concentrations of organic matter (esteemed as COD) and consequently higher values of optical parameters connected with it: optical density D at 254 nm (D254) and intensity of fluorescence I (humic-like and protein-like). Correlation coefficient (r) between D254 and COD is 0.66, which is more than 3 times higher than between COD and D at wavelengths used for determination of color (380 or 410 nm). In the samples from river Okhta, correlation coefficients were between 0.69 and 0.90 for concentration of total nitrogen (TN) and I (humic-like or protein-like). Concentrations of chlorides and inorganic nitrogen gave higher values of r with protein-like fluorescence (0.58–0.71), concentrations of ammonium-ion and total phosphorus—with humic-like fluorescence (0.54–0.83). BOD5 showed negative correlation with I. These data show that I at studied wavelengths can be used for monitoring of the water quality in the urban river.
