The fiske-subbarow method for determining phosphate with special reference to soil extracts
Version of Record online: 28 APR 2006
Copyright © 1951 John Wiley & Sons, Ltd
Journal of the Science of Food and Agriculture
Volume 2, Issue 1, pages 36–42, January 1951
How to Cite
Yuen, S. H. and Pollard, A. G. (1951), The fiske-subbarow method for determining phosphate with special reference to soil extracts. J. Sci. Food Agric., 2: 36–42. doi: 10.1002/jsfa.2740020106
- Issue online: 28 APR 2006
- Version of Record online: 28 APR 2006
- Manuscript Received: 23 OCT 1950
Modifications of the Fiske-Subbarow method are described by which susceptibility to interference by silicate, arsenate, and certain acids and salts was reduced. In view of the possibility that some soils may contain considerable amounts of extractable arsenate and ferric iron, a method for eliminating interference by these two ions, by reduction with metabisulphite, is described. By this procedure, arsenate and ferric iron up to 20 p.p.m. As2O5 and 80 p.p.m. Fe had no effects on the determination.
The applicability of the modified technique to the determination of phosphate in soil extracts and in plant ashes is examined.