Determination of Inorganic Phosphorus in Oxalate Extracts of Soils1
- L. B. Owens,
- D. W. Nelson and
- L. E. Sommers2
A simple and rapid procedure for the determination of inorganic phosphorus in acid ammonium oxalate extracts of soils was developed by modifying the ascorbic acid-molybdenum blue colorimetric method. The oxalate interference in the determination of P was overcome by addition of excess ammonium molybdate. A molar ratio of molybdate to oxalate, in the final solution, of 2.51:1 was required in order to eliminate the oxalate interference.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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