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Studies in Tropical Soils I. Identification and Approximate Estimation of Sesquioxide Components by Adsorption of Alizarin

Published online by Cambridge University Press:  27 March 2009

F. Hardy
F. Hardy
Affiliation:
Imperial College of Tropical Agriculture, Trinidad
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Extract

1. An alizarin-adsorption method discovered by Schmelev has been successfully applied, with suitable modification, to the identification and approximate estimation of the free sesquioxide components of clays and soils.

2. Details of the tested procedure are presented, together with some preliminary results obtained.

3. The free alumina component of clays and soils appears to adsorb alizarin only after ignition, whereas the free iron oxide component adsorbs it only in the fresh, unignited state. Hence, by applying the procedure to the fresh, as well as to the ignited material, an approximate estimate of both components may be accomplished in a relatively short time.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 21 , Issue 1 , January 1931 , pp. 150 - 166
Copyright
Copyright © Cambridge University Press 1931

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References

REFERENCES

(1)Croucher, H. H.Dye adsorption by hydrous alumina in soils. J. Agric. Sci. (1928), 18, 350.Google Scholar
(2)Schmelev, L. A. A method of determining free aluminium oxide in silicate mixtures, and its application to the study of clays. Trans. Ceram. Res. Inst. Moscow (1928), 14. British Chem. Abstr. B (1928), 47, 895.Google Scholar
(3, a)Weiser, H. B. and Porter, E. E.The physical chemistry of colour lake formation. III. Alizarin lakes. J. Physical Chem. (1927), 31, 1824.CrossRefGoogle Scholar
(3, b)Weiser, H. B.The physical chemistry of colour lake formation. V. Hydrous oxide-alizarin lakes. J. Physical Chem. (1929), 33, 1713.CrossRefGoogle Scholar
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