Membrane filters

Recommended for clarification and sterilisation of aqueous solutions, microbiological analysis and particle counts

• Membranes with grid lines are ideal for microbiological analysis (bacterial counts) of water, pharmaceuticals, beverages, cosmetics, etc. for the measurement of coliform bacteria and other germs
• Gridded membranes (black grid on white membrane) for counts of colonies as a standard method of quantification, black grid, clearly defined sections (3.1 x 3.1 mm grid)
• Special ink, non-toxic and totally free from bacterial growth inhibitors, is used for imprinting
• Sterilised membranes (packaged in individual blisters)

Recommended for clarification and sterilisation of aqueous solutions, microbiological analysis and particle counts.

• Qualified for aqueous solutions (pH 4-8), hydrocarbons and some dilute solvents
• High non-specific adsorption: 160 µg/cm² for gamma globulin and pore size 0.2 µm (decreases with increasing pore size)
• High mechanical stability, ideal for gravimetrical measurements
• Maximum temperature 180 °C

S-Pak filters are manufactured from mixed cellulose esters and have been specially optimized for MF methods. Microbiological analysis of water or other liquids.

Recommended for aqueous samples, biological applications and protein filtration.

• Compatible to aqueous solutions with pH 4-8, most alcohols, hydrocarbons and oils
• Filtration of aqueous solutions for biological and clinical analysis
• Sterilisation of biological solutions (CA-membranes with a pore size of 0.2 µm are specially recommended when the recovery of proteins is critical)
• High thermal stability: 180 °C
• Very low nonspecific adsorption

Circular filter for ultrafiltration for sample concentration in stirring cells. The PES diaphragm offers a high flow rate.

Recommended for clarification and sterilisation of aqueous solutions, microbiological analysis and particle counts

• Qualified for aqueous solutions (pH 4-8), hydrocarbons and some dilute solvents
• High non-specific adsorption: 160 µg/cm² for gamma-Globulin
• Maximum temperature 130 °C

MF-Millipore™ Membranes have a biologically inert mixture of cellulose acetate and cellulose nitrate. The MF-Millipore™ filters without Triton® surfactant have a lower water extractable content compared to the standard MF-Millipore™ filters and contain a minimal amount of wetting agent.

Features & Benefits:

• Manifold filter for biological and environmental monitoring applications
• available in various pore sizes
• white or black coloured
• Freely selectable whether with or without grid surface
• Compatible with ethylene oxide, gamma irradiation and autoclave sterilization methods

MF-Millipore™ Membranes have a biologically inert mixture of cellulose acetate and cellulose nitrate. The MF-Millipore™ filters without Triton® surfactant have a lower water extractable content compared to the standard MF-Millipore™ filters and contain a minimal amount of wetting agent.

Features & Benefits:

• Manifold filter for biological and environmental monitoring applications
• available in various pore sizes
• white or black coloured
• Freely selectable whether with or without grid surface
• Compatible with ethylene oxide, gamma irradiation and autoclave sterilization methods

White. They are recommended for the filtration of aqueous solutions and proteins. Due to their low content of extractable substances, they are suitable for sample preparation in environmental analysis.

• High flow rates
• Low non-specific protein adsorption
• High resistance

White, individually sterile packed. Resistant to steam sterilisation up to 134 °C, or in dry heat up to 180 °C. Very low adsorption (important when filtering proteinaceous solutions). Suitable for particle removal and ultracleaning of aqueous solutions, methanol, ethanol, high-grade alcohols and residue analysis of fuels and oils. The extractable content of these filters make up < 1 % of their weight. Other pore sizes and formats available on request.