Characterization of different humic materials by various analytical techniques

In a previous paper, we studied the characterization of the three humic materials, humic acid, fulvic acid and humin, by simple analytical techniques such as elemental analysis and potentiometric titration. In this work, the same humic fractions were investigated by the developed analytical methods CP/MAS ¹³C NMR, IR and visible spectroscopy’s; to evaluate the harmony of the different analytical methods used for characterization of humic materials and to recognize and evaluate the properties of humic acid, fulvic acid and humin separated from the same source. The results of these developed analytical methods were compared with that of simple analytical techniques. It was found that the low cost simple analytical techniques are suitable for description of humic materials, where the results are in fine agreement with each other. The E₃/E₅ ratio was found to designate a more or less similar indication like E₄/E₆ ratio.