Printedfrom:https://online.uspnf/uspnf/document/GUID-1DE4082B-E660-4E89-A199-2344AE2E03EB_1_en-US?highlight=791 ©2019USPC 〈791〉pH INTRODUCTION Forcompendialpurposes,pHisdenedasthevaluegivenbyasuitable,properlycalibrated,potentiometricsensorandmeasuringsystem.[NOTE—Themeasuring systemhastradition...