Why don’t we do pH test for tablet?
pH test is performed for aqueous solutions to determine the concentration of hydrogen ions in them. As you must be knowing, pH is a (-) negative logarithm of (H+) ion concentration. As the tablet formulations are in solid dosage forms it is not possible to do a pH test.
Knowing the pH of any dosage form is not at all required whose mode of administration & destribution oral dosage form . It’s mode of action i.e. pharmacokinetic & pharmacological not required specified pH range .
Any customize mode of action required specific pH range it must part of in process quality control i.e. Entering coated tablets.
pH value one the most parameter which affect the stability of drug. & this effect is obviously appearing on the liquid & semi solid not solid preparations.