Ano Disc Circle w/out Support Ring, 47mm Diameter, 0.2um Pore Size (50/Pk) SKU: 6809-5522

Aluminum Oxide (Anopore) Membrane Filters - 6809-5522

The Whatman 6809-5522 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. Verified 0.2 pore distribution across the Hydrophilic membrane surface guarantees batch-to-batch consistency in particle capture and analyte passage. Accordingly, consistent surface properties across the full membrane area support uniform particle capture and reliable results in gravimetric, microscopic, and culture-based analytical workflows.

Material Specifications

• Inorganic and extremely rigid, offering no deformation under high pressure filtration.
• Supplied in bulk non-sterile packaging, offering an economical option for routine clarification and general laboratory filtration tasks.
• Transparent when wet, making them exceptional for light microscopy applications.
• Precisely controlled pore geometry provides sharp molecular weight cutoffs for size-based separation of nanoparticles and macromolecules.
• Thermally stable to over 400°C, Anopore membranes withstand sterilization and high-temperature processing without structural change.

Maintaining accreditation under ISO 17025 or similar quality frameworks requires documented traceability at every step — the specification compliance of each membrane lot supports your ongoing audit readiness. Chemical inertness across the full pH range gives you a membrane that handles your most aggressive aqueous matrices — strong acids, strong bases, and oxidizing solutions — without the degradation that limits organic polymer alternatives. Take control of your sample preparation variables and ensure that your data reflects the true nature of your work, rather than the quality of your consumables.

For more information about chemical compatibility, please review our Chemical Compatibility Chart.

Bubble Point (psi)

N/A

Color

white

Diameter

47mm

Extractables

minimal

Filtration Area

17.35cm²

Flow Rate

25ml (Water)

Grid (Yes/No)

No

Material

Aluminum Oxide

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

400°C

Membrane Thickness (µm)

60um

Pack Count

50

pH Range

4-9

Pore Size (µm)

0.2

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Vacuum Clarification - Utilized in Buchner funnels to rapidly remove particulates from large-volume batches of non-critical laboratory buffers.
• Quality Control Testing - Serves as a standard check filter for routine batch purity tests, verifying the absence of visible physical contaminants.
• Microscopy mounting - Retains microorganisms on a flat surface, allowing for direct staining and enumeration under a high-power microscope.
• Stack Pre-filtration - Acts as a spacer or depth layer in multi-tier filtration stacks to extend the life of the final downstream membrane.
• Radiometric Counting - Collects radioactive precipitates for scintillation counting, providing a consistent geometry for accurate data measurement.
• Sediment Collection - Efficiently harvests precipitates from chemical reactions, allowing for the recovery and drying of the solid synthesis product.