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Soil Science and Plant Nutrition Volume 35, 1989 - Issue 3
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Original Articles

Determination of molecular weights of humic acids by osmotic pressure measurement and by permeation chromatography on controlled pore glass

Kiyoshi Tsutsuki Faculty of Agriculture, Nagoya University, Chikusa-ku, Nagoya, Japan
&
Shozo Kuwatsuka Faculty of Agriculture, Nagoya University, Chikusa-ku, Nagoya, Japan
Pages 393-403 | Received 04 Aug 1988, Published online: 14 May 2012

References

  • Cameron , R.S. , Thornton , B.K. , Swift , R.S. and Posner , A.M. 1972 . Molecular weight and shape of humic acid from sedimentation and diffusion measurements on fractionated extracts . J. Soil Sci. , 23 : 394 – 408 .
  • Hayes , M.H.B. and Swift , R.S. 1978 . The chemistry of soil organic colloids. In The Chemistry of Soil Constituents , Edited by: Greenland , D.J. and Hayes , M.H.B. 179 – 320 . Chichester : John Wiley & Sons .
  • Inoko , A. and Tamai , M. 1976 . Studies on soil humus with special reference to its molecular weight systems . Bull Natl. Inst. Agric. Sci., Ser. B , 28 : 119 – 180 . (in Japanese with English summary)
  • Kuwatsuka , S. , Tsutsuki , K. and Kumada , K. 1978 . Elementary composition of humic acids. Chemical studies on soil humic acids. I . Soil Sci. Plant Nutr. , 24 : 337 – 347 .
  • Stevenson , F.J. 1982 . “ Colloidal properties of humic substances ” . In Humus Chemistry. Genesis, Composition, Reactions , Edited by: Stevenson , F.J. 285 – 308 . New York : Wiley-Interscience .
  • Tsutsuki , K. and Kuwatsuka , S. 1978a . Composition of oxygen-containing functional groups of humic acids. Chemical studies on soil humic acids. II . Soil Sci. Plant Nutr. , 24 : 547 – 560 .
  • Tsutsuki , K. and Kuwatsuka , S. 1978b . Nitrogen distribution in humic acids. Chemical studies on soil humic acids. III . Soil Sci. Plant Nutr. , 24 : 561 – 570 .
  • Tsutsuki , K. and Kuwatsuka , S. 1979a . Amino acid, phenol, and sugar composition in humic acids. Chemical studies on soil humic acids. IV . Soil Sci. Plant Nutr. , 25 : 29 – 38 .
  • Tsutsuki , K. and Kuwatsuka , S. 1979b . Degradation of humic acids with potassium hydroxide. Chemical studies on soil humic acids. V . Soil ScL Plant Nutr. , 25 : 183 – 195 .
  • Tsutsuki , K. and Kuwatsuka , S. 1984 . Molecular size distribution of humic acid as affected by the ionic strength and the degree of humiflcation . Soil Sci. Plant Nutr. , 30 : 151 – 162 .
  • Wershaw , R.L. and Aiken , G.R. 1985 . “ Molecular size and weight measurements of humic substances ” . In Humic Substances in Soil, Sediment, and Water , Edited by: Aiken , G.R. and Wershaw , R.L. 477 – 492 . New York : Wiley Interscience .

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