Anotop 25mm Sterile Syringe Filters, 0.02 um, 50 Pk
Whatman SKU: 6809-2102

Whatman Anotop Aluminum Oxide Syringe Filters, 0.02 µm, 25 mm, 50/Pk - 6809-2102

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. Many syringe filters ship with lot-specific quality documentation, giving analysts traceability that an ad hoc bulk filtration setup typically lacks. Chemically inert aluminum oxide handles aqueous and solvent samples cleanly and becomes visibly clear the moment it is wetted. Polypropylene construction resists chemical degradation from routine sample matrices while pressing snugly against the membrane during the pass and is supplied pre-sterilized in individual packaging for sterile sample preparation. When chromatographic methods demand particle-free injections, the column stays clean from run to run, protecting method performance and column life.

Membrane Characteristics

• Naturally hydrophilic ceramic surface wets without pre-wetting in aqueous samples
• Rigid inorganic structure withstands high temperatures with minimal extractables
• Absolute pore-size rating holds consistent across every protocol
• Inorganic ceramic structure resists solvent swelling common to polymer membrane materials
• Uniform capillary pore array gives high pore density without lateral crossover

Housing Characteristics

• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Each housing is factory-sterilized and sealed individually to maintain sterility through the supply chain.
• Burst pressure rating provides a wide safety margin above the rated maximum operating pressure.
• Inert polyolefin wall contributes minimal sample adsorption to the filtrate

Filtering particulates upstream keeps your column running longer between maintenance cycles. Reliable particulate removal protects your instruments and your data across reagent, buffer, and mobile-phase preparation. Standardize your filtration purchases across every method with volume pricing and documentation from the Tisch Scientific team.

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

• HPLC Solvent Filtration - Filter chromatography mobile phases and solvents reliably, resisting degradation from aggressive organic reagents.
• Small Volume CE - Filter tiny sample volumes for capillary electrophoresis, minimizing hold-up volume to conserve valuable sample material.
• NMR Sample Filtration - Delivers aggregate-free aqueous filtrates with no organic extractables interfering with proton or carbon NMR spectra.
• Carbohydrate Prep - Prepare saccharide samples for analysis, ensuring no organic extractables interfere with sensitive carbohydrate detection.
• Radiotracer Sample Prep - Filters aqueous radiotracer solutions with minimal ionic background for scintillation and gamma spectrometry counting.
• Wastewater Solids Monitoring - Retains and recovers suspended solids and microbial contaminants from effluent samples for permit limit verification.