[azoct]

Hello!

i have encountered a few product in which the pH was measured using special procedure. The pH was measured by taking the percentage of the solution in IPA:DI. eg; 5% of solution A in 1:1 water/ipa. however, i  have no idea why this method was used.

so, can anybody please explain or enlighten me regarding this matter.

Thank You

[Borek]

Most likely it is not possible to measure pH directly for some reason. IPA presence suggests low solubility of the substance in pure water.

Please note that it is a tricky approach - generally speaking pH is defined ONLY for water solutions.