Anotop 25mm Syringe Filter, 0.02 um, 50 Pk
Whatman SKU: 6809-2002

Whatman Anotop Aluminum Oxide Syringe Filters, 0.02 µm, 25 mm, 50/Pk - 6809-2002

Whatman's Anotop line separates by physical particle dimension alone, a capability rooted in ceramic media chemistry rather than the organic polymer chemistries used in most other membrane technologies. Sample preparation for chromatography often ends with a syringe filter on the path to the vial. The nanoporous Anotop surface slows early bacterial colonization compared to a smooth surface while presenting proteins with a permanently hydrophilic oxide surface and holds a uniform capillary pore array. Low-extractable polypropylene keeps sample purity intact through the filtration pass and stands firm against aqueous acids, bases, and alcohols during regular handling. Where analytical results depend on clean samples, the preparation step stays consistent from sample to sample through a pre-tested syringe filter.

Membrane Characteristics

• Low intrinsic autofluorescence limits background signal in fluorescence work
• Uniform capillary pore array gives high pore density without lateral crossover
• Anodized alumina matrix contains no monomers, plasticizers, adhesives, or wetting agents
• Rigid inorganic structure withstands high temperatures with minimal extractables
• Absolute pore-size rating holds consistent across every protocol

Housing Characteristics

• Standardized luer connection geometry provides secure engagement with standard syringe tips
• Inert polyolefin wall contributes minimal sample adsorption to the filtrate
• Thermal-bonded construction keeps adhesives out of the fluid path
• Impact-tolerant polypropylene body withstands routine bench handling without damage

Clarify your routine aqueous samples in a single pass and cut down on juggling multiple filter types at the bench. Consistent aqueous clarification clears particulates without slowing your bench routine the same way every time you run it. Bulk pricing kicks in on larger filtration orders, so ask the Tisch Scientific team for a quote.

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

Bubble Point (psi)

6.9 bar (100 psi)

Burst Pressure (psi)

100psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Anopore (Aluminum Oxide)

Diameter

25mm

Filtration Area

4.15cm²

Holdup Volume

<150µl

Material

Anopore

Maximum Operating Pressure

100psi

Maximum Operating Temperature (°C)

40°C

Pack Count

50

Pore Size (µm)

0.02

Prefilter (Yes/No)

No

Sterility

Nonsterile

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Fluorescence Spectroscopy Prep - Removes scattering particles from chromophore solutions for clean emission spectra in cuvette measurements.
• NMR Sample Filtration - Delivers aggregate-free aqueous filtrates with no organic extractables interfering with proton or carbon NMR spectra.
• Liposome Extrusion - Size liposomes into uniform vesicles precisely, enabling consistent drug delivery research with defined pore structures.
• Membrane Protein Research - Filters detergent-solubilized protein preparations to remove insoluble aggregates before crystallography and cryo-EM.
• Drinking Water Compliance - Concentrates microorganisms from potable water samples for enumeration and regulatory-method pathogen detection testing.
• Cold Sterilization - Sterilize heat-sensitive additives safely, using 0.02 µm pores to remove bacteria without degrading critical components.