SPECTROSCOPIC CHARACTERISTICS OF AQUATIC HUMIC SUBSTANCES IN THE UV AND VISIBLE REGION
水生腐殖酸的可见—紫外光谱特征

Spectroscopic examination of humic substances from river, lake and sea water as well as from river and lake sediments in the UV-VIS region indicated that the E240/E420) ratios of water humic substances differ significantly from those of sediment humic substances. A cluster analysis based on the absorption spectra of the humic substances revealed a similar fact. Considering the humic substances from fresh water and sea water respectively, linear relationship between the optical density and the total organic carbon content of the samples implied that a spectrophotometric method (e.g. at 220 nm) for determination of humic substances concentration is possible.