using organic solvent as the wetting liquid bubble point, and water instrusion/immersion method using injection water (purified water).
* Hydrophobic Disc membrane only use organic solvent as the wetting liquid bubble point test.
Water intrusion/immersion method has completely solved the problem of residue, pollution and safety of bubbling point method with organic solvent. At present, the water immersion method has become the preferred method for the test of hydrophobic filter cartridge.