Ano Disc Circle w/ Support Ring, 25mm Diameter, 0.1um Pore Size (50/Pk) SKU: 6809-6012

Aluminum Oxide (Anopore) Membrane Filters - 6809-6012

The Whatman 6809-6012 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. A uniform Aluminum Oxide (Anopore) matrix maintains its rated 0.1 cutoff under the pressures and flow conditions encountered during routine laboratory filtration. Because of this, 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

• Thermally stable to over 400°C, Anopore membranes withstand sterilization and high-temperature processing without structural change.
• Anopore Aluminum Oxide membranes feature a unique honeycomb pore structure for precision.
• Inorganic and extremely rigid, offering no deformation under high pressure filtration.
• Transparent when wet, making them exceptional for light microscopy applications.
• Non-fibrous ceramic construction eliminates the shedding and fiber release associated with depth filter media.

Reproducible particle counting and size distribution analysis start with a membrane surface that captures particles uniformly — the pore consistency documented above ensures your counts reflect the sample, not random variation in the filter. The rigid, inorganic pore structure of aluminum oxide membranes does not compress or deform under pressure, ensuring that your rated retention specifications hold constant across the full operating pressure range of the device. Elevate the quality of your analytical data today by standardizing on a filtration product built to meet the exact specifications of your applications.

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

Bubble Point (psi)

N/A

Color

white

Diameter

25mm

Extractables

minimal

Filtration Area

4.91cm²

Flow Rate

25ml (Water)

Grid (Yes/No)

No

Material

Aluminum Oxide

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

40°C

Membrane Thickness (µm)

60um

Pack Count

50

pH Range

4-9

Pore Size (µm)

0.1

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

Polypropylene Support Ring

Wettability

Hydrophilic

• Vacuum Clarification - Utilized in Buchner funnels to rapidly remove particulates from large-volume batches of non-critical laboratory buffers.
• Stack Pre-filtration - Acts as a spacer or depth layer in multi-tier filtration stacks to extend the life of the final downstream membrane.
• Quality Control Testing - Serves as a standard check filter for routine batch purity tests, verifying the absence of visible physical contaminants.
• Gravimetric Analysis - Captures total suspended solids from liquid samples on a weighed disc, ensuring accurate mass measurements for reporting.
• Microscopy mounting - Retains microorganisms on a flat surface, allowing for direct staining and enumeration under a high-power microscope.
• Air Particulate Sampling - Traps airborne dust and pollen on a positioned open-face filter disc for subsequent microscopic or chemical analysis.