B503-89: AWWA Sodium Tripolyphosphate (PDF)

The history of the standard, manufacture and use of sodium tripolyphosphate, impurities, information regarding use of this standard, and major revisions are covered in the foreword. Section 1 discusses scope, definitions, affidavit of compliance, and basis for rejection. Section 2 discusses material including physical requirements, chemical requirements, and impurities. Section 3 covers sampling, packaging and shipping, and marking. Section 4 on testing methods covers laboratory examination, test procedure for size, test procedure for solubility, test procedure for P2O5 content, alternate test procedures for P2O5 content, and test procedure for pH. Major revisions include: section on impurities in Foreword has been expanded, section on phosphorus conversion equivalents has been added, and change in the preferred P2O5 test methods and addition of reference to Standard Methods for the Examination of Water and Wastewater.