Excerpt from Studies on the Estimation of Inorganic Phosphorus in Plant and Animal Substances

The evidence upon which this method was based was submitted in the original publication. In the further study of this method Observations were made as will be discussed. Our bases for judg ment as to the correctness of the method were the agreement of triplicates, the completeness of recovery of added phosphates, and the completeness of extraction during the three-hour period speci fied, as determined by subjection of the residue to further extraction.

In the further study of this method especial attention was given to (1) the use of phenol in the extractive reagent, (2) the complete ness of the 3-hour extraction, (3) improvement of the method of filtration, and other details of technique.

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