Molecular weights and spectral characteristics of humic and fulvic acids

@inproceedings{Tan1972MolecularWA,
  title={Molecular weights and spectral characteristics of humic and fulvic acids},
  author={Kim Hock Tan and Joel E. Giddens},
  year={1972}
}
Abstract Gel-filtration of humic and fulvic acid with Sephadex G-50 yielded low and high molecular weight fractions with different chemical and spectral characteristics. In contrast to the low molecular weight fraction, high molecular weight humic acid was insoluble in H 2 O and had a strong infrared C-H absorption at 2,900 cm −1 . Both humic acid fractions had lower E 4 /E 6 values than fulvic acids, and no correlation could be found between humic acids partition coefficient (K d ) and E 4 /E… CONTINUE READING