Particularly suitable for aqueous solutions. They are hydrophilic. Thermally stable to 121°C. Ideal for gravimetric analysis and are often used for contamination tests. PTFE: polytetrafluoroethylene membranes Particularly suitable with aggressive media, as well as to concentrated acids and bases. They are hydrophobic, they can be used up to 145°C. RC: regenerated cellulose membranes These membranes are resistant to most organic solvents. They are mostly used for filtration of solvent mixtures and ultrapurification and degassing of HPLC eluents. CA: cellulose acetate membranes They have a low protein binding capacity and they are suited for aqueous and alcoholic media. They are hydrophobic and can be used for hot gases up to 180°C. NC: nitrocellulose membranes They are easily wettable and suited for filtration of aqueous solutions. In dry atmosphere these membranes are thermally stable at 125°C and can be autoclaved at 121°C. PE: polyester membranes They are hydrophilic. Particularly suitable for fine titration, dust analysis, aerosol analysis and ultra-purification of
