On the components of soil humic acids (part 8) the oxidative decomposition by alkaline potassium permanganate and nitric acid

As for the reactions by oxidizing agents of humic acids and for the products obtained by the said reactions, a number of investigations (1) have been made with regard to the study of the chemical structure of humic acids and with the use of the products of decomposition. The authors (2) have observed that A-or B-types of soil humic acids could be separated into three or four fundamental composing fractions by using Al 2 O 3 column.