Abstract

In the determination of total phosphorus, there was only a very slight, if any, condensation of orthophosphate to polyphosphates when the sample to be tested was incinerated in perchloric acid or in sulfuric acid. Both colorimetric method and radioactivity measurements were applied for the determination of orthophosphate remained as such in the digest. Also, the loss of phosphoric acid was not observed when care was taken so as not to allow the white vapor of the acid emerge from the digestion flask during incineration.

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