Membrane filters

White. For the filtration of air and gases, as well as the filtration of solvents and acids.

• Good chemical resistance
• Autoclavable
• Non-sterile

The membrane filters suitable for use in the Microsart™ e.motion are individually sterile-sealed,without protective paper on top of each filter, in a specially designed individual package on a band. For complete traceability, the membrane filter type, diameter, lot number and a unique serial number are printed on the package of each membrane filter unit. Specially developed pore structures of the 0.45 ìm high Flow membrane filters permit faster filtration based on their high flow rates and throughputs.

All Microsart membrane filters are "multi-fit" and can be used in all standard dispenser systems.

The membrane filters have a diameter of 47 mm or 50 mm, and are white, green or grey with a high-contrast 3.1 mm grid.

Membranes of polytetrafluoroethylene (PTFE) are particularly suited for aggressive media, since they are chemically inert towards aqueous and organic solutions as well as towards concentrated acids and bases. These membranes are hydrophobic, thus the pressure for filtration of aqueous solutions has to be higher than the breakthrough pressure. PORAFIL^® TE membranes can be used at temperatures up to 145 °C

White. Very low content of extractable materials. Weight constant after 60 minutes of drying at 105 °C. Suitable for residue analysis, microscopic viewing in incident or transmitted light, chemotaxis, x-ray fluorescence, spectrometry and gravimetric analysis. Autoclavable at 121 °C. Other pore sizes and formats are available on request.

Composed of cellulose acetate (~20 %) and cellulose nitrate (~80 %).

• Very easily wetted
• For aqueous solutions
• Hydrophilic
• Can be used up to 125 °C
• Autoclavable up to 121 °C

Applications:
For microbiological analysis (sterile with grid)
Properties:
0.45 µm pore size, 100 % microbe retention of serratia
marcescens
1.2 µm pore size for microbiological control of yeasts

Application:

• Universal filter, especially in the pharmaceutical section

• Mechanically very strong
• For aqueous and organic solutions
• Hydrophilic
• Can be used up to 135°C
• Autoclavable up to 134°C

Very high wet strength and very low ability for protein binding. For filtration of aqueous, alcohol and oil-based solutions at temperatures up to 180°C.

• spontaneously wetted, very good wet-strength
• high chemical resistance, useful for aqueous and organic media
• hydrophilic
• can be used up to 180 °C
• sterilisable by all methods
• suitable for use as sterile filter to ASTM-D 3862-80