Membrane filters

These cellulose mixed ester membranes are reinforced with a polyester fabric. Their filtration properties are very similar to membranes PORAFIL® CM, however, they are mechanically much more stable.

Membranes of cellulose mixed esters are ideal for gravimetric analysis. They are particularly suited for aqueous solutions. The hydrophilic membrane is thermally stable to 125 °C and can be autoclaved at 121 °C. This membrane is often used for contamination tests.

Membranes of cellulose mixed esters are ideal for gravimetric analysis. They are particularly suited for aqueous solutions. The hydrophilic membrane is thermally stable to 125 °C and can be autoclaved at 121 °C. This membrane is often used for contamination tests.

PORAFIL® NC membranes are made from cellulose nitrate. They are easily wettable and suited for filtration of aqueous solutions. In dry atmosphere these membranes are thermally stable to 125 °C and can be autoclaved at 121 °C.

Membranes of regenerated cellulose are resistant towards most organic solvents. They are, for example, used for filtration of solvent mixtures and ultrapurification and degassing of HPLC eluents.

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

Polyester membranes are hydrophilic and particularly suited for fine filtration, dust analysis, aerosol analysis and ultra-purification of solvents.

Polycarbonate membranes are mainly used for the determination of AOX.

These membranes of cellulose acetate have a low protein binding capacity and are suited for aqueous and alcoholic media. The membranes are hydrophilic and can be used for hot gases up to 180 °C. They can be sterilised.

Recommended for clarification and sterilisation of aqueous solutions, microbiological analysis and particle countsQualified for aqueous solutions (pH 4-8), hydrocarbons and some dilute solventsHigh non-specific adsorption: 160 µg/cm² for gamma-GlobulinMaximum temperature 130 °CHazardous Substance DataGHSSignal wordGefahrH-SatzH228SDSLink

Recommended for clarification and sterilisation of aqueous solutions, microbiological analysis and particle countsQualified for aqueous solutions (pH 4-8), hydrocarbons and some dilute solventsHigh non-specific adsorption: 160 µg/cm² for gamma-GlobulinMaximum temperature 130 °CHazardous Substance DataGHSSignal wordGefahrH-SatzH228P-SatzP210, P240, P241, P280, P370+P378UNNR3270SDSLink

White. For filtration of biological solutions.HydrophilVery low protein bindingAutoclavable

Hydrophilic, low protein bindingSmooth surface for easy identification of particlesHighly resistant to chemicals and good thermal stabilityAutoclavable up to 121 °CApplications: Ideal for environmental and water analysis.

Track-etched for highly defined pore size and high pore densityTreated with PVP to render it hydrophilicLow extractables, minimizing sample contamination riskHigh chemical resistance and good thermal stability for a wide range of sample typesLow, consistent ash and low tare weightsSmooth flat surface for high particle visibility

Membrane filters Cyclopore™ polycarbonate are true pore size microporous membranes featuring the sharp cut-off and reproducible microfiltration characteristics of track-etched membrane filters.Low affinity for stains improves visibility under a microscopeLow protein binding minimizes sample loss of proteinaceous samplesNarrow pore size distribution and high pore density support rapid surface capture of analyteNegligible absorption and adsorption of filtrate; nonhygroscopicNo particle shedding enables clean filtrateBiologically inertFilters are autoclavable for 30 min at 121 °C

Sterile, individually wrapped membrane filters for the microbiological analysis of aqueous samples using the membrane filter technique.

The filter dispenser is ideal for microbiological test laboratories with a high throughput. The device is designed to hold 200 membrane filters. Individual membrane filters are dispensed aseptically at the touch of a button on the soft-touch keypad. Refill packs can be easily loaded and unloaded at any time. Guide plates help when loading refill packs to prevent jamming. The dispenser can be plugged into main power source or operated with the NiMH rechargeable battery for mobile use.Dimensions: 120 x 220 x 200 mmWeight: 0.9 kgScope of supply: Membrane filter dispenser, power transformer with EU/UK/US power cord, user guide

White. For various applications.HydrophilicAutoclavableHazardous Substance DataGHSSignal wordGefahrH-SatzH228P-SatzP210, P370+P378, P240, P241, P280UNNR3270SDSLink

White. For general microbiological analysis.SterileIndividually-packedGriddedWith imprint of article numbers, batch numbers, pore sizes and sequential numbers4 x 150 membrane filters

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.Other patterns are available on request.Hazardous Substance DataGHSSignal wordGefahrH-SatzH228P-SatzP230, P234, P243, P233, P210, P372, P375, P370+P380, P501UNNR3270SDSLink

White membrane with black grid, for detection of bacteria with dyed media, particle count & microscopy, individually, sterile packaged / non sterile.Hazardous Substance DataGHSSignal wordGefahrH-SatzH228P-SatzP210, P243SDSLink

spontaneously wetted, very good wet-strengthhigh chemical resistance, useful for aqueous and organic mediahydrophiliccan be used up to 180 °Csterilisable by all methodssuitable for use as sterile filter to ASTM-D 3862-80Application: For the sterilisation and particle filtration of aqueous and organic solutions

Material: Anopore®. White.The inorganic membrane Anopore® consists of high-purity aluminium oxide and can be used for a wide range of applications. The unique material has a precise, non-deformable honeycomb structure with a narrow pore size distribution range that guarantees very efficient particle retention. In addition, the membrane has a low protein binding capacity, minimal autofluorescence, is non-toxic and supports cellular growth.