Anotop 25mm Syringe Filter, 0.2um, 50 Pk
Whatman SKU: 6809-2022

Whatman Anotop Aluminum Oxide Syringe Filters, 0.2 µm, 25 mm, 50/Pk - 6809-2022

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. A sterilizing-grade syringe filter delivers point-of-use sterile filtration in a single-use format, without the housing and gasket maintenance a reusable stainless steel filter holder requires. Low-binding aluminum oxide provides sterile-grade retention with high recovery while pulling samples by capillary action through straight channels and turns optically clear once wetted with liquid. Polypropylene construction maintains a low-dead-volume internal flow path while keeping the sample chemically unaltered across the pass and holds its seal true run after run. Where bacterial contamination must stay out of the sample, manufacturer-tested retention keeps the instrument and downstream assay protected without a housing to maintain or clean.

Membrane Characteristics

• Mineral oxide chemistry gives proteins little to adsorb onto
• Absolute pore-size rating holds consistent across every protocol
• Anodized alumina matrix contains no monomers, plasticizers, adhesives, or wetting agents
• Extractable content stays minimal without interfering with downstream detection
• Uniform capillary pore array gives high pore density without lateral crossover

Housing Characteristics

• Low moisture absorption keeps the housing dimensionally stable through humid storage and shipping
• Resists stress cracking from aqueous salt and buffer solutions
• Impact-tolerant polypropylene body withstands routine bench handling without damage
• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics

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. Review our Chemical Compatibility Chart, or ask technical service to confirm chemical compatibility for your specific application.

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

Bubble Point (psi)

6.2 bar (90 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)

0.2

Prefilter (Yes/No)

No

Sterility

Nonsterile

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Single-Particle Analysis - Concentrates nanoparticles from dilute suspensions for tunable resistive pulse sensing and nanoparticle tracking.
• NMR Sample Filtration - Delivers aggregate-free aqueous filtrates with no organic extractables interfering with proton or carbon NMR spectra.
• Fluorescence Spectroscopy Prep - Removes scattering particles from chromophore solutions for clean emission spectra in cuvette measurements.
• Drinking Water Compliance - Concentrates microorganisms from potable water samples for enumeration and regulatory-method pathogen detection testing.
• AFM Sample Deposition - Removes large aggregates from colloidal suspensions before deposition on mica for atomic force microscopy surface imaging.
• Clinical Biomarker Prep - Removes debris from plasma and serum aliquots for protein and small-molecule biomarker profiling by mass spectrometry.