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Products
Whatman Filters
Whatman has been part of cytiva since 2020 and is one of the most successful brands in filtration technology. The Schleicher & Schuell brand filters have been part of Whatman since 2004. Whatman filters are used in a wide range of areas such as quality testing in the pharmaceutical industry and in the food and beverage industry, but also in research and in environmental monitoring.
Here you can quickly find the right paper filters as pleated filters or round filters, membrane filters, glass fibre filters or HPLC syringe filters from Whatman. You may use the drop-down menu on the left to select filter type, pore size, diameter and material to find the right filter for your application.
Click here for an overview of the individual grades of Whatman filters and the areas of application.
Whatman Syringe Filters
We carry the entire line of Whatman syringe filters. Here you will find an overview of the most common syringe filters:
| Application | Filter | Diameter [mm] | Features | Membrane |
|---|---|---|---|---|
|
High performance: For both simple and demanding analytical requirements; these syringe filters offer premium quality and efficiency |
Anotop | 10, 25 |
|
Anopore |
| Puradisc | 4, 13, 25, 30 |
|
CA, CN, RC, PTFE, H-PTFE, Nylon, PP, DpPP, PES, PVDF, GMF | |
|
Difficult Filtration: For use with high-particulate and viscous samples; these syringe filters contain two or more filter layers for efficient and cost-effective filtration without blockage |
Anotop Plus | 10, 25 |
|
Anopore |
| GD/X | 13, 25 |
|
CA, PTFE, Nylon, PP, PES, PVDF, GMF, RC | |
| GD/XP | 25 |
|
Nylon, PVDF, PP, PES, PTFE, DpPP | |
|
Automated Systems: These robust syringe filters are compatible with most high throughput and/or dissolution systems |
Roby | 25 |
|
Nylon, RC, GMF |
| Anatop IC | 10, 25 |
|
Anapore | |
|
Application Specific: For specific applications: HPLC, IC and LC with certification; bioethanol and protein purification production; environmental sampling prior to COD/DOC analysis |
Anotop LC | 10, 25 |
|
Anopore |
| Spartan HPLC Certified | 13, 30 |
|
RC | |
| All-in-One | Mini-Uniprep |
|
||
|
Advantage: Reliable quality, economical portfolio for basic applications |
Uniflo | 13, 25, 30 |
|
Nylon, PES, PVDF, PTFE, H-PTFE |
Most qualitative and quantitative filter papers from Whatman are made from high-quality cotton linters that have been treated to achieve a minimum alpha cellulose content of 98%. These cellulose filter papers are used for general filtration and have a particle retention of up to 2.5 μm. A wide range of retention and flow rate combinations are available to meet the requirements of numerous laboratory applications. The various groups of filter papers offer increasing levels of purity, hardness and chemical resistance. The quantitative Whatman filter papers have extremely high purity and are suitable for analytical and gravimetric work.
The properties of borosilicate glass micro fibers from Cytiva provide retention levels down to the submicron range. These depth filters offer a combination of fast flow rate with high loading capacity and retention of very fine particles. Due to the high pore volume of glass microfiber filters, the loading capacity is much higher compared to a cellulose filter with similar retention.
Glass microfiber filters must be used flat and should not be folded. Whatman glass microfiber filters are made of 100% borosilicate glass and are usually completely binder-free. Binder-free glass microfiber filters can withstand temperatures up to 550 °C and can therefore be used for gravimetric analyses where ignition is required.
Unlike cellulose and glass microfiber depth filters, membrane filters are conventionally classified as surface filters because the filter matrix acts as a screen and retains particulates almost entirely on the smooth membrane surface. The retention levels for these filters extend down to 0.02 μm and allow the efficient retention of sub-micron particulates and organisms. Water microbiology and air pollution monitoring are major applications for membranes.
