Read at a joint meeting of the Agriculture Group, the Fertilizer Society and the Society of Public Analysts on October 18, 1949.
The photometric determination of phosphorus in fertilizers using the phosphovanado-molybdate complex†
Article first published online: 28 APR 2006
Copyright © 1950 John Wiley & Sons, Ltd
Journal of the Science of Food and Agriculture
Volume 1, Issue 6, pages 172–173, June 1950
How to Cite
Hanson, W. C. (1950), The photometric determination of phosphorus in fertilizers using the phosphovanado-molybdate complex. J. Sci. Food Agric., 1: 172–173. doi: 10.1002/jsfa.2740010604
- Issue published online: 28 APR 2006
- Article first published online: 28 APR 2006
- Manuscript Received: 21 NOV 1949
This rapid method makes use of the stable yellow colour complex developed when an excess of a molybdate solution is added to an acidified solution of a vanadate and an orthophosphate; all three reagents required can be used in a composite solution. Details for the determination of water-soluble and total phosphate are given using the Spekker photoelectric absorptiometer. Results agree within 2.5% of those obtained by the standard gravimetric method, those on nine fertilizers being given.