抄録
Application of light scattering intensities has been investigated to water quality determination by using Xe lamp and He-Ne laser as light sources. The samples obtained in a lake, pond, river, dam reservoir and secondary effluent were submitted to the investigation. The analyzed water qualities are Suspended Solids (SS), Nitrogen oxide (NOx), Chlorophyll a (Chl.a), Protein and Total Organic Carbon (TOC).
The coefficient of determination between Chl.a concentration and the fluorescence intensity at 685nm was obtained as 0.993. Single correlation coefficients on other water qualities showed comparatively low values (r2=0.386-0.894). Whereas it is clear that the calculated values by multiple regression correlated to the observed values by adopting some light scattering intensities as predictor valuables (r2=0.982 in SS, 0.984 in NOx, 0.967 in Protein and 0.965 in TOC). This method is unnecessary of pre-treated samples such as filtration and addition of reagent and can determine rapidly and simply to monitor the water quality in natural watershed.
