Membrane filters

LABSOLUTE® offers a wide selection of membrane filters for microfiltration. You can choose between several membrane materials, diameters and pore sizes. Usage of membrane filters is recommended both for filtration of air and fluid and is optimally suited in particular for retention of very small particles. Precisely defined micro pores and exceeding stability - this combination makes it a good choice for applications in the microbiological sector, as well as in the pharmaceutical, food and water analysis industry.

Cellulose acetate membranes are characterized by an extraordinary high flow capacity and dimensional stability. The filters have good thermal resistance and can be used in various applications.

• Hydrophilic
• Low protein binding capacity
• Maximum operating temperature: 135 °C
• Non-sterile
• Autoclavable at 121 °C

The uniform pore structure of the LABSOLUTE® nitrocellulose membranes allow high throughput and diffusion rates and guarantee ultrapure and consistent results due to a very low extent of extractables.

• Hydrophilic
• High protein binding capacity
• Maximum operating temperature: 180 °C
• Autoclavable at 121 °C

The uniform pore structure of the LABSOLUTE® nitrocellulose membranes allow high throughput and diffusion rates and guarantee ultrapure and consistent results due to a very low extent of extractables.

• Hydrophilic
• High protein binding capacity
• Maximum operating temperature: 180 °C
• Autoclavable at 121 °C

• Sterile and non-sterile

LABSOLUTE® offers a wide selection of membrane filters for microfiltration. You can choose between several membrane materials, diameters and pore sizes. Usage of membrane filters is recommended both for filtration of air and fluid and is optimally suited in particular for retention of very small particles. Precisely defined micro pores and exceeding stability - this combination makes it a good choice for applications in the microbiological sector, as well as in the pharmaceutical, food and water analysis industry.

PCTE membrane filters are produced in a two-step manufacturing process which complies with high quality standards. The membrane consists of a thin PC film with precisely defined pores ensuring ultrapure and consistent filtration results.

• Hydrophilic
• Low protein binding capacity
• Maximum operating temperature: 140 °C
• Non-sterile
• Autoclavable at 121 °C

LABSOLUTE® offers a wide selection of membrane filters for microfiltration. You can choose between several membrane materials, diameters and pore sizes. Usage of membrane filters is recommended both for filtration of air and fluid and is optimally suited in particular for retention of very small particles. Precisely defined micro pores and exceeding stability - this combination makes it a good choice for applications in the microbiological sector, as well as in the pharmaceutical, food and water analysis industry.

Filters made of regenerated cellulose membrane provide excellent resistance to almost all kinds of organic solvents and high temperatures.

• Hydrophilic
• Low protein binding capacity
• Maximum operating temperature: 134 °C
• Non-sterile
• Autoclavable at 121 °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.

Gray membrane (after wetting, black) with white grid, for detection of yeasts and molds, particle count and microscopy, individually, sterile packaged / non sterile.

• Hydrophilic, low protein binding
• Smooth surface for easy identification of particles
• Highly resistant to chemicals and good thermal stability
• Autoclavable up to 121 °C

White membrane with black grid, for detection of bacteria with dyed media, particle count & microscopy, individually, sterile packaged / non sterile.

Green membrane with dark-green grid, providing optimal contrast to light-colored or transparent bacteria colonies, individually, sterile packaged / non sterile.

Type 111. 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.

Type 230. Polycarbonate (PC), white, non-sterile. Ultrapure, polycarbonate membrane with especially smooth surface and fine pore distribution. Applications include COD/TOC testing, particle analysis or epifluorescence microscopy.

White membrane with green grid, for detection of bacteria with dyed media, particle count and microscopy, individually, sterile packaged / non sterile.

Applications:

• Excellent for gravimetrical analysis
• Especially for aqueous solutions
• Ideally suitable for contamination test

• Economical
• Constant weight
• Hydrophilic
• Not sterile
• Can be used up to 125 °C
• Autoclavable up to 121 °C

Housing MBS. SFCA / CA (Surfactant-free Cellulose Acetate) membrane. For sterile, particle free, ultrapure filtration of small volumes of liquid up to approx. 100 ml. Colour coded and printed for easy membrane and pore size identification. With hydrophilic cellulose acetate membrane for minimum adsorption. Ready-to-use. With female luer-lock inlet, male luer slip outlet.

Hydrophilic, durable and compatible with a wide range of aqueous solutions, organic solvents and for the filtration of biological preparations and media. Autoclavable at 121 °C.

Plain white. Circles.
Application

• For prefiltration and dust measurement, clarification and filtration
• Filtration of aqueous solutions

• Very easily wettable
• Hydrophilic
• Used up to 125 °C
• Autoclavable (121 °C)

Applications:

• For prefiltration and dust measurement, clarification and sterile filtration
• For aqueous solutions

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

SafetySpace™ Filter Tips leave more space between the sample and the filter than conventional filter tips. This allows pipetting any type of liquid or using any pipetting technique without the risk of the precious sample absorbing into the filter. In effect, this secures 100% sample recovery and thus greater accuracy. Particularly suitable for pipetting foaming liquids such as buffers and proteins, pipetting solvents, multiple dispensing functions of electronic pipettes, reverse pipetting. Certified DNase, RNase and endotoxin free.

Type 250. Polyamide, white. For filtration of alkaline solutions and organic solvents.

Standard Grade Regenerated Cellulose (RC) is a clear, flexible and sturdy dialysis tubing. This tubing is ideal for a broad range of applications in which there is a significant size difference between the MW species being separated, including sample preparartion, desalting, buffer exchange, pH change, protein purification. Offering a good chemical compatibility, Standard Grade RC can be used with dilute strong acids and bases, concentrated weak acids and bases, most alcohols and some mild or dilute organics, including DMSO. Standard RC can tolerate pH 2 to 12 and temperatures 4 to 121 °C
RC dialysis tubing supplied dry with glycerol humectant for easy handling and manipulation. Soak in DI water for 30 minutes to remove glycerol. Contains trace levels of heavy metals and sulphides.

• 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

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.

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.

Ready-to-use dialysis device with screw cap for ultimate convenience for small volume dialysis. Easy loading and recovery. No needles, closures, knots, buoys, pontoons, or weights required. Made with Biotech CE membrane in 9 MWCO"s (0.1 to 1000 kD) and 3 volume sizes (1, 5 and 10 ml).

Standard and Weighted Spectra/Por Closures provide a leak-proof seal for dialysis tubing while aiding in sample buoyancy and vertical orientation. They are available in 23, 35, 55, 75 and 90 mm sealing widths and a variety of colors for easy sample identification. Closures are autoclavable.

With this dispenser you can choose between three operating modes. Operation by push button, sensor or foot switch. With the model 16713----BO (Art no. 6.289 058), wireless operation is also possible only with battery.

• Capacity for up to 250 membrane filters
• Cleaning with standard disinfectants possible
• Low weight and convenient handle for easy transport

For sterile ventilation of fermenters, culture vessels, etc. or to act as a water barrier between the suction flask and the vacuum pump in filtration applications. The supported PTFE membrane within a PP housing gives excellent chemical resistance. Filter in either direction (3 bar max. pressure).

• Stepped horse-barb of 6-12 mm on either sides
• sterile single packed filters, autoclavable

The very low adsorption membranes are hydrophilic, solvent-resistant (pH 3-12) and therefore suitable for the particle removal from solvents.

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.

Applications:

• Ideal venting filter for all applications
• For aggressive media and cryogenic liquids
• Separation of free water from organic solutions
• Outstanding as gas/liquid barrier
• Filtration of air and (hot) gases

• Chemically inert to aqueous and organic solutions as well as concentrated acids and bases
• Hydrophobic - for aqueous filtration the pressure must be higher than the water breakthrough pressure
• Can be used up to 145°C
• Can be sterilised by all methods except gamma radiation

With PP backing.

Microsart^® @filter 100 and 250 filter units are a sterile and ready-to-use combination of funnel made of PP with 47 mm diameter, filter base and gridded membrane in one unit. They have been specifically developed for the detection and enumeration of microorganisms in pharmaceuticals, cosmetics, food, beverages, water and other liquids. The membrane filters can also be used in conjunction with Sartorius Stedim Biotech nutrient board discs.

Microsart^® media are dishes pre-filled with different types of agar medium, sterile-packaged and ready to use.

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.

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.

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.

Polycarbonate membranes are mainly used for the determination of AOX.

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

Standard Grade Regenerated Cellulose (RC) is a clear, flexible and sturdy dialysis tubing. This tubing is ideal for a broad range of applications in which there is a significant size difference between the MW species being separated, including sample preparartion, desalting, buffer exchange, pH change, protein purification. Offering a good chemical compatibility, Standard Grade RC can be used with dilute strong acids and bases, concentrated weak acids and bases, most alcohols and some mild or dilute organics, including DMSO. Standard RC can tolerate pH 2 to 12 and temperatures 4 to 121 °C
RC dialysis tubing supplied pre-wetted with glycerol removed for convenience in 0.05 % sodium azide solution. Simply rinse away the preservative solution with DI water, load the sample and dialyze.

SEPARA integrates in one single device auto-sampler vial, filtration membrane, plunger, and cap/septa. The single step filtering process is efficient and saves time. Fast and simple to use. Reducing sample loss. After filtration the sample is ready to use in most standard autosampler. The pre-slit cap ensures easy and clean transfer of sample. 5 different septa material, PP vial with Ø 12 x 33 mm, Filtering capacity 0.48 ml, dead volume <30 µl, maximum operating temperature 50 °C

Filter handling for MF method testing has been revolutionized by the EZ-Pak membranes and dispensers. They combine the advantages of ready-to-use, sterile and individually packaged membranes.

Durapore® PVDF membranes are characterized by high throughput and high flow rate. To maximize recovery and minimize interaction with your sample, the membrane has very low protein binding.

Features & Benefits:

• Can be sterilized by ethylene oxide and gamma irradiation
• Available in different pore sizes

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

The stacked-disk format of Millipak® filter units eliminates the risk of fiber release from downstream support material.

Features & Benefits:

• No risk of membrane cracking as the 0.22 µm membrane is supported by a rigid plastic disc with channels
• As the membranes are welded onto the support disc, the risk of contamination is considerably reduced
• Minimum dead volume thanks to the large filter surface

In contrast to nitrocellulose, Immobilon membranes have a number of advantages. An optimized coloring capacity, a broad solvent compatibility and a lower background make the membranes your solution. Immobilon membranes do not rupture or curl and can be cut without breaking. Reprobing is also possible many times. The Immobilon NC membrane without surfactant, is perfect for not disturbing cell wall integrity during cell wall growth.

Features & Benefits

• Mixed cellulose matrix
• Recommended for colony lifts

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