Ano Disc Circle w/out Support Ring, 47mm Diameter, 0.02 um Pore Size (50/Pk) SKU: 6809-5502

Aluminum Oxide (Anopore) Membrane Filters - 6809-5502

The Whatman 6809-5502 combines a controlled pore size distribution with low extractable levels, ensuring the data accuracy that sensitive analytical methods require. Quality-controlled manufacturing ensures the filtration medium delivers the retention efficiency and throughput that demanding laboratory protocols require. Each membrane disc reflects a manufacturing standard where retention characteristics, physical integrity, and dimensional accuracy are verified before release.

Material Specifications

• Bulk packaging format provides cost-effective access for high-volume laboratories performing non-critical filtration and sample preparation.
• Anopore Aluminum Oxide membranes feature a unique honeycomb pore structure for precision.
• Thermally stable to over 400°C, Anopore membranes withstand sterilization and high-temperature processing without structural change.
• Precisely controlled pore geometry provides sharp molecular weight cutoffs for size-based separation of nanoparticles and macromolecules.
• Inorganic and extremely rigid, offering no deformation under high pressure filtration.

If your protocol requires direct on-membrane analysis by microscopy or culture, the surface characteristics and dimensional tolerances described above give you a substrate that performs consistently from disc to disc. In particular, aluminum oxide's inherent resistance to bacterial colonization eliminates the biofilm formation risk that forces more frequent replacement of polymeric membranes in your long-term or intermittent-use filtration setups. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

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)

0.02

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

None

Wettability

Hydrophilic

• Radiometric Counting - Collects radioactive precipitates for scintillation counting, providing a consistent geometry for accurate data measurement.
• Vacuum Clarification - Utilized in Buchner funnels to rapidly remove particulates from large-volume batches of non-critical laboratory buffers.
• Gravimetric Analysis - Captures total suspended solids from liquid samples on a weighed disc, ensuring accurate mass measurements for reporting.
• Quality Control Testing - Serves as a standard check filter for routine batch purity tests, verifying the absence of visible physical contaminants.
• Air Particulate Sampling - Traps airborne dust and pollen on a positioned open-face filter disc for subsequent microscopic or chemical analysis.
• Stack Pre-filtration - Acts as a spacer or depth layer in multi-tier filtration stacks to extend the life of the final downstream membrane.