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Information Provided on Humic Substances by E4/E6 Ratios by Y. Chen; N. Senesi; M. Schnitzer is a Environmental Science article available to read on EtoBox.
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usually referred to as E^Eg, reportedly is independent of The ratio of optical densities or absorbances of dilute, aqueous concentrations of humte materials but varies for humic rnahumic and fulvic acid solutions at 465 and 665 nm (£</£") is widely tenals extracted from different soil types (Kononova, 1966; used by soil scientists for the characterization of these materials. While Schmtzer and Khan, 1972). For example, according to it has been suggested that the EJE t ratio is related to the degree of con- Kononova (1966), EjE 6 ratios for HA's extracted from densation of the aromatic carbon network, carbon content, and molec-Podzolic soils are about 5.0, ratios for HA's extracted from ular weight of humic substances, little rigorous experimental evidence Dark Gray Forest soils are 3.5, those for ordinary Cheris available in the literature to confirm these hypotheses. nozem HA's are 3.0-3.5, for Sierozem HA's they are The results of this investigation show that the EVE 6 ratio of humic 4.0^.5, and those for Krasnozem HA's are about 5.0. For and fulvic acid is: (i) mainly governed by the particle size (or particle p A ' s E j^ ratlos range between 6 and 8.5 (Kononova, or molecular w
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It is typically read by researchers, students, and practitioners in Environmental Science.
- Author
- Y. Chen; N. Senesi; M. Schnitzer
- Publisher
- Wiley
- Published
- 1977
- Language
- EN
- Field
- Environmental Science (Physical Sciences)