Membrane Filters by Sartorius
Our broad range of membrane filtration products offers highly individualized solutions
Sartorius produces a wide variety of microporous membranes especially designed, developed and manufactured to meet differing needs in the biotechnology industry. Backed up by decades of experience in membrane manufacturing and utilizing the most state-of-the-art production equipment on the market, we guarantee excellent performance, consistent quality and a reliable supply of membrane products.
Membrane filtration is one of the most effective separation processes and is steadily under development leading to new prospects. Sartorius membranes are available in a wide variety of pore sizes and structures — as well as surface properties — to serve nearly unlimited selectivity of separation.
Membrane Filter Portfolio
Best-Selling Membrane Filters
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Cellulose Nitrate (CN) Membrane Filters
Cellulose nitrate or mixed cellulose ester membrane filters are indicated for many general laboratory applications where a membrane with high non-specific adsorption is suitable. This membrane is made of even cellulose nitrate, a material which assures effective retention with high flow rates and optimum colony growth.
Cellulose Acetate (CA) Membrane Filters
Cellulose acetate membranes combine high flow rates and thermal stability with very low adsorption characteristics and are therefore excellently suited for use in pressure filtration devices.
CA membrane filters are hydrophilic, have high flow rates thanks to their symmetric structure, and are compatible with aqueous solutions (pH 4 – 8), oils, alcohols and other organic solvents.
Polyethersulfone (PES) Membrane Filters
Polyethersulfone (PES) membrane filters are hydrophilic membranes with high flow rate and low non-specific protein adsorption.
These properties make them excellent for the filtration of aqueous solutions as well as various solvents and pharmaceutical solutions.
Regenerated Cellulose (RC) Membrane Filters
Regenerated Cellulose membranes are very low adsorption membranes that are also hydrophilic, solvent-resistant (pH 3-12) and excellently suited for particle removal from solvents.
These properties make them excellent for the filtration of aqueous solutions as well as various solvents and pharmaceutical solutions.
Polyamide (PA) Membrane Filters
Polyamide membrane filters are hydrophilic and chemically resistant to alkaline solutions and organic solvents. They are therefore recommended for the particle removal from aqueous solutions and solvents for analytical determination such as HPLC.
They are also suitable for the sterile filtration of these liquids as well as for applications where a membrane with a relatively high nonspecific adsorption is acceptable.
Hydrophobic Polytetra-fluorethylene (PTFE) Membrane Filters
Hydrophobic PTFE (polytetra-fluorethylene) membranes are permanently hydrophobic. The main application of these membrane filters is the filtration of air, gases or chemicals.
Unlike other (hydrophilic) filter types, they are not wetted by air humidity, allowing unhindered passage of air at low differential pressures as well. PTFE membrane filters have an excellent chemical compatibility (pH 1 to 14), so that they are also used for the filtration of solvents and acids, to which other filter types are not resistant. Moreover, they can be used to filter aqueous solutions as well, but, because of their hydrophobic characteristics, they must be pre-wetted with ethanol or methanol before the filtration of aqueous media solutions.
Polycarbonate Track-Etched (PC-TEM) Membrane Filters
Polycarbonate Track-Etched (PC-TEM) membranes are uniquely structured membranes designed for mostly specialized uses where their unique properties can be exploited.
These white and hydrophilic polycarbonate track-etched membranes are manufactured from high grade polycarbonate film using track-etch technology. The etching allows their capillary pore structure to be uniform and precise, making a membrane with a narrow pore size distribution, and thus, are excellent for precise particle retention and analysis.
Why Choose Sartorius Membrane Filters?
Sartorius Membrane Filters Offer...
As the production of membranes mark one of Sartorius’ main competencies, we are proud to offer high expertise and forward our knowledge to you as a customer.
We are covering many essential applications in the life science industry. These include HPLC filtration, bioburden reduction, protein filtration, microbiological testing and many more.
Our product range contains up to seven membrane types and 10 pore sizes. Furthermore, we offer a diameter range from 13mm to 293mm. This allows you to get a membrane that fits your laboratory demands.
FAQs
Membrane Filter Frequently Asked Questions
In case you are not able to find a membrane according to your specific needs, please feel free to reach out to LabFiltrationPM@sartorius.com.
The shelf life of Sartorius membranes are as follows:
Sartorius Stedim Biotech Material name | As manufactured flat filter disc products (years) |
|---|---|
Cellulose Acetate | 5 |
Cellulose Nitrate | 4 |
Reg. Cellulose | 5 |
Ultrafilters | 3 |
Polyamide | 4 |
PESU (Polyethersulfone) | 5 |
Sartobind (Type Q + S) | 5 |
PTFE (Polytetrafluoroethylene) | 5 |
PC (Polycarbonate) | 5 |
Polymer | Features | Typical Applications |
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Cellulose acetate (CA) |
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Cellulose nitrate |
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Regenerated cellulose (RC) |
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Polyamide (PA) |
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Polyethersulfone (PES) | Low content of extractables |
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Hydrophobic PTFE | Permanently hydrophobic membranes |
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Hydrophilic membrane filters have a polar group on the membrane surface which makes them capable of filtering water. In contrast, hydrophobic membranes are unpolar and reject water from passing through. Hydrophobic filters are typically used for air and gas filtration purposes.
Microfiltration is a membrane technical filtration process which retains or removes contaminants in the range from 0.1 µm to 10 µm form fluids (liquid and gas) by passing through a microporous membrane.
- Pressure differential across the membrane
- Filter type
- Filter surface area
- Viscosity of fluid
- Temperature of fluid
- Use of a prefilter
