PHOTOMETRIC TITRATION OF SODIUM HUMATE

Abstract

The curves of sodium humate photometric titration with hydrochloric acid were measured in the visible spectral range. It was shown that the absorption switching to scattering makes a measured absorbance change during titration. The results are discussed concerning the formation of humic acids colloidal phase.

Keywords

• humic acids, spectroscopy, titration, light scattering, rayleigh’s law, colloidal solutions