Can orthophosphate testing methods be applied to phosphoric acid samples?

Document ID

Document ID TE1075

Published Date

Published Date 27/05/2017
Question
Can orthophosphate testing methods be applied to phosphoric acid samples?
Summary
Phosphate tests in phosphoric acid.
Answer
When testing phosphate in phosphoric acid sample you will likely need to dilute the samples prior to testing as the concentration will be very high (the Molybdovanadate methods should work, pH adjustment may not be necessary since reagents in this method are acidic). Titration methods by an acid may be another good alternative.