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. At the sub-micron pore rating, a syringe filter delivers sterilizing-grade retention at the point of use. The honeycomb channel array pulls liquid the membrane's full depth at once and becomes transparent in liquid after wetting. The PP housing sustains efficient flow on viscous samples 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, the sub-micron pore rating clears it before the sample reaches the instrument.

Technical Specifications

• Branched-pore alumina structure yields uniform unilamellar liposomes in fewer extrusion passes than polycarbonate membranes
• Anodized alumina structure stays chemically stable in aqueous solutions across a pH 3 to pH 9 range
• Anodized alumina matrix contains no monomers, plasticizers, adhesives, or wetting agents, removing a source of trace organic contamination
• Absolute pore-size rating gives consistent retention across protocols
• Naturally hydrophilic ceramic surface wets without pre-wetting in aqueous samples

Housing Specifications

• Minimal ionic background from the polypropylene housing supports ion chromatography and trace-metal ICP-MS sample preparation.
• Standardized luer connection geometry provides secure engagement with standard syringe tips
• Medical-grade polypropylene with broad chemical compatibility
• Resists stress cracking from aqueous salt and buffer solutions

A clean particulate separation keeps your aqueous sample preparation dependable. Consistent aqueous clarification clears particulates without slowing your bench routine from the first sample of the day through the last. 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

• Small Volume CE - Filter tiny sample volumes for capillary electrophoresis, minimizing hold-up volume to conserve valuable sample material.
• Gravimetric Solids Testing - Determine particulate mass accurately, using a non-hygroscopic ceramic that resists moisture-driven drift.
• Epifluorescence Counting - Counts bacteria and viruses precisely in water samples, using the low-autofluorescence surface for microscopy.
• HPLC Solvent Filtration - Filter chromatography mobile phases and solvents reliably, resisting degradation from aggressive organic reagents.
• Low Background Specs - Prepare samples for spectrophotometry, ensuring extremely low optical background for the most sensitive analytical readings.
• Liposome Extrusion - Size liposomes into uniform vesicles precisely, enabling consistent drug delivery research with defined pore structures.