Detection of industrial effluent pollutants using diffuse reflectance spectrometry

Author.Diffuse reflectance spectrometry is shown to be useful for the quantitative determination of small concentration and reflectance is described by the Kubelka-Munk equation. The experiments were performed with a laboratory constructed diode array spectrophotometer. We can obtain the quantitative reflectance values of different precipitates like ammonium with Nessler's reagent and complex such as Cu(II); Co(II) and Ni(II) with dithiooxamide by forming a spot color on filter paper. We have obtained for each reagent a calibration curve by plotting the reflectance vs the log of the mol.1-1 concentration. The linearity obtained was very satisfying. We can consider that for a direct measurement of the intensity of reflectance, it is possible to perform quantitative spot-test analysis