US dropwise 50 ml of sample liquid disinfectant music card is taken and placed in a beaker, the electrode dipped in the test solution, the displayed value until the pH stabilized recording.
The 50 ml meta-card disinfectant sample original solution is taken and placed in a beaker, the electrode is immersed in the measured solution, and its pH is recorded after the display value is stable.
50 ml of the original solution of midrile brand disinfectant sample was taken and placed in a beaker, the electrode was immersed in the measured solution, and the pH value was recorded after the displayed value was stable.