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KMID : 1059519950390010066
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Journal of the Korean Chemical Society
1995 Volume.39 No. 1 p.66 ~ p.70
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Spectroscopic Characterization of Soil Humic Acid Fractions by Molecular Weight
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Shin Hyun-Sang
Moon Hi-Chung
Yang Han-Beom
Yun Sock-Sung
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Abstract
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The soil humic acid was subdivided into four subfractions by molecular weight (F1: >100.000 dalton; F2: >100.000 dalton; F3: >10.000 dalton; F4: >2.000 dalton) using MP-dual hollow fiber ultrafiltration system. The characterization using IR, 1H and 13C NMR spectroscopy, showed similar spectroscopic features of HA, demonstrating that the bulk properties of HA subfractions are very similar to one another. IR spectral data showed a decrease in polysaccharide contents and increase in carboxylate functionality as molecular weight become smaller.
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