Filter Membrane
The filter membrane from HAWACH has two types: round disc and roll types, both of the membranes can be used for filtration and sterilization of liquids, gas, and other samples.
Hawach filter membrane has a smooth surface, light texture, high porosity, and uniform microporous structure, so the membranes have the characteristics of a fast flow rate and are not easy to adsorb. They can remove all micro-organisms and particles reliably, without any effects on the ingredients during the whole process, and the quality meets the standard.
| Description | Diameter | Micron Rating | Price |
| Nylon Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.8um 1.0um 3.0um 5.0um 10.0um | 13mm 25mm 47mm 90mm 142mm 293mm | |
| Hydrophobic PTFE Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 1.0um 3.0um 5.0um 10.0um | ||
| Hydrophilic PTFE Membrane Disc, non-sterile (unsupported & supported both available) | 0.22um 0.45um | ||
| PES Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.65um 0.8um 1.2um | ||
| CA Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.8um 1.0um 3.0um 5.0um | ||
| PVDF Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.65um 1.0um 3.0um 5.0um | ||
| MCE Membrane Disc, non-sterile | 0.1um 0.22um 0.45um 0.8um 1.0um 3.0um 5.0um | ||
| MCE Gridded Membrane Disc, sterile | 0.22μm, 0.45μm, 0.8μm | 25mm 47mm 50mm | |
| GF Membrane Filter Disc (With Binder) | 0.45um 1.0um 1.6um | 13mm 25mm 47mm 50mm 60mm 90mm 100mm 106mm 120mm 142mm 150mm 200mm 250mm | |
| PP Membrane Filter | 0.1um 0.22um 0.45um 0.65um 0.8um 1.0um 3.0um 5.0um 10.0um | 13mm 25mm 47mm 50mm 60mm 90mm 100mm 106mm 142mm 150mm 200mm 250mm 293mm | |
| Electrophoresis CA Membrane | 0.22μm | 25*152mm, 55*144mm, 57*127mm, 57*140mm, 57*144mm, 57*144mm, 50*200mm, etc | |
| Regenerated Cellulose Membrane Filter | 0.22μm, 0.45μm | 13mm 25mm 47mm 50mm 90mm 142mm | |
| Polycarbonate Membrane Filter | 0.22μm, 0.45μm | 13mm 25mm 47mm 50mm 90mm 142mm | |
| Cellulose Nitrate Membrane Filter | 0.22μm, 0.45μm | 13mm 25mm 47mm 50mm 90mm |
Application of membranes with different pore sizes:
- 0.22μm membrane filter: It can remove very fine particles in samples and mobile phases; it can meet the requirements of 99.99% sterilization stipulated by GMP or Pharmacopoeia;
- 0.45μm membrane filter: It can filter out most bacteria and microorganisms; conventional samples and mobile phase filtration can meet general chromatographic requirements;
- 0.8-1.0μm: It removes most insoluble particles and is suitable for the analysis and detection of samples with relatively low requirements such as ultraviolet light. Tested Oral Solid Dosage Dissolution Testing.
- 1-5μm: It is able to filter larger particles of impurities, or for the pretreatment of difficult to handle turbid solutions, it can be filtered with a 1-5μm membrane first, and choose a corresponding membrane to filter it.
According to the application, the filter membrane can be divided into an aqueous membrane and an organic membrane:
Aqueous: Microporous membrane is used in aqueous solution, but it is not resistant to organic solvents. It is a hydrophilic microporous membrane.
Organic: The microporous membrane is relatively hydrophobic, but it is suitable for organic solutions. It is a hydrophobic microporous membrane also called hydrophobic filter paper. For organic systems, there is no problem in filtering aqueous solutions, but conversely, water-based ones may be dissolved by organic solvents and are not suitable for the filtration of organic systems.
| Material | Solvents | Features | Application |
|---|---|---|---|
| MCE | Water System | Not resistant to acid, alkali, and organic solvents | HPLC mobile phase filtration, sterilization |
| CA | Water System | Low protein adsorption | HPLC mobile phase filtration, sterilization |
| PTFE | Water System/ Organic System | Almost resistant to all solvents, acid, and alkali resistance, with no leaching. | Filtration of most solvents, HPLC mobile phase filtration |
| PVDF | Organic System | Organic system, high chemical stability, acid, and alkali resistance | Chromatographic sample preparation |
| PES | Water System | High flow rate, low dissolution, and good strength filtration treatment. | Ion chromatography solution filtration, sample filtration treatment |
| Nylon | Water System/ Organic System | Various applications, acid, and alkali resistance are commonly used in laboratories. | HPLC mobile phase and sample filtration, suitable for most solvents |
| Regenerated Cellulose | Water System/ Organic System | Low non-specific adsorption, especially suitable for particle removal filtration. | Ultra-clean and degassing filtration of solvents, HPLC mobile phase filtration |
| Hydrophilic PP | Water System/ Organic System | Small adsorption, almost no leaching, but high price. | Impurity detection sample processing, strong organic solvent filtration |
The relationship between the aqueous membrane and organic membrane: The so-called water system and organic system are divided according to the material of the filter membrane, and are respectively suitable for filtering aqueous solutions (for life science) and organic solutions (for chemical applications).
We are available in a broad range of materials such as PTFE, PVDF, Nylon, MCE, CA, PES, GF, PP and etc. So, our Hydrophilic PTFE membrane filters, MCE membrane filters, sterile MCE grid membrane filters, PES membrane filters, microporous glass fiber membrane filters are ideal choices for filtration. OEM service and customized sizes are also available.
