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The photometric determination of phosphorus in fertilizers using the phosphovanado‐molybdate complex
Author(s) -
Hanson W. C.
Publication year - 1950
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.2740010604
Subject(s) - molybdate , gravimetric analysis , molybdenum blue , reagent , phosphorus , chemistry , vanadate , phosphate , photoelectric effect , inorganic chemistry , mineralogy , materials science , organic chemistry , optoelectronics
Abstract 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.