How to test the PH value of HPMC

Actually, PH value is not a very important property of HPMC, because it does not have a significant impact on the application, but we still need to know the PH value, and avoid HPMC’s PH value being too high or too low, and it would be better to keep it around 7, all right, let’s show you how to test the PH value.

1). What equipments do we need to test the PH value of HPMC?

  1. 0.0001 g analytical balance
analytical balance 0.0001
analytical balance 0.0001 g

2. 0.01g analytical balance

analytical balance 0.01g
analytical balance 0.01g

3. heating magnetic stirrer

heating magnetic stirrer
heating magnetic stirrer

4. digital overhead stirrer

digital overhead stirrer
digital overhead stirrer

2). Testing steps

  1. get 1.0000 g HPMC
get 1.0000 g HPMC
  1. get 99.00 g hot water
  1. put the HPMC into the hot water
put HPMC into hot water
  1. keep stirring the solution for several minutes
stir the solution
  1. put the beaker into the cold bath and keep stirring
cool down the solution
  1. test the temperature to make sure it’s under 25 degrees.
test the temperature
  1. keep stirring while heating until it’s up to 25 degrees.
stir the solution while heating
  1. test the PH value
test the ph value

All right, the test result is 7.9, and it is between 5.0-7.5. it could totally meet your need if it’s used in building materials, and we do this test after each batch, so please if you need HPMC, just feel free to contact us.

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