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Article
Deniges' method for determination of phosphate, with special reference to soil solutions and extracts
Article first published online: 1 MAY 2006
DOI: 10.1002/jsfa.2740060408
Copyright © 1955 John Wiley & Sons, Ltd
1097-0010/asset/cover.gif?v=1&s=b47620dd25eabc179c6838560a664c2310e44227 "Journal of the Science of Food and Agriculture")
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How to Cite
Yuen, S. H. and Pollard, A. G. (1955), Deniges' method for determination of phosphate, with special reference to soil solutions and extracts. J. Sci. Food Agric., 6: 223–229. doi: 10.1002/jsfa.2740060408
Publication History
- Issue published online: 1 MAY 2006
- Article first published online: 1 MAY 2006
- Manuscript Accepted: 15 OCT 1954
- Manuscript Received: 11 JUN 1954
- Abstract
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- Cited By
Abstract
A modified molybdenum-blue method is described, with stannous chloride as the reducing agent, for determining phosphate in soil solutions and soil extracts; ferric iron in amounts up to 15 p.p.m. had no ill effect.
The influence of varying concentrations of sulphuric acid, ammonium molybdate and stannous chloride on the formation of phosphomolybdenum-blue complex and the interference due to silicate, arsenate and ferric iron were examined.
A study of the effects of various ions showed that ions commonly occurring in soil solutions and some soil extracts did not affect the accuracy of direct determinations of phosphate, but arsenate should be absent from the test.