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Studies on soil reaction. II. The colorimetric determination of the hydrogen ion concentration in soils and aqueous soil extracts (Preliminary communication.)

Published online by Cambridge University Press:  27 March 2009

E. A. Fisher
E. A. Fisher
Affiliation:
Rothamsted Experimental Station (Lawes Agricultural Trust)
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Extract

The methods used for the determination of — log [] fall naturally into two groups:

(a) Electrometric, and

(b) Colorimetrie methods.

Electrometric methods were first introduced into analytical practice in 1897 by Böttger(l) who determined the neutral point in titrating acids with alkalis by using a gas chain; subsequent improvements were made by Hildebrand (16), Gumming and Gilchrist(10); Hasselbalch(15), W. M. Clark(6), Michaelis(19), Walpole(28, 29) and others. The method has been applied to the measurement of [] of biological fluids with considerable success*. It was first applied to the measurement of [] of soil suspensions by G. Fischer (12) in Germany in 1914 and subsequently in America by Sharp and Hoagland(23), and by Gillespie(13, 14) and his co-workers.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 11 , Issue 1 , January 1921 , pp. 45 - 65
Copyright
Copyright © Cambridge University Press 1921

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References

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