Pura Disc 25mm PES Syringe Filters, 0.45um, 1000 Pk
Whatman SKU: 6794-2514

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 0.45 µm, 25 mm, 1000/Pk - 6794-2514

Whatman has built such a strong track record in published methods that laboratories default to citing its name in standardized protocols. Syringe filters span a wide range of membrane chemistries and pore sizes, so the format can be matched to the sample matrix and solvent system in use. PES admits aqueous reagents on contact, skipping any surfactant rinse and handles strong bases across a broad aqueous range. Polypropylene construction holds its dimensional form through high-temperature sample preparation while maintaining a low-dead-volume internal flow path and holds its seal true run after run. Where small-volume samples must reach the instrument clean, low hold-up volume keeps sample loss minimal while the instrument stays protected from particulate damage.

Technical Specifications

• Operating temperatures up to 130°C leave mechanical integrity intact
• Inherent hydrophilicity allows instant aqueous wetting with no pre-wetting step
• Non-hydrogen-bonding surface avoids the polar adsorption nylon's amide backbone causes
• Compatibility spans both nucleic acid and protein-based filtration
• Chemical breadth spans alcohols, glycols, and aqueous buffers

Housing Specifications

• Medical-grade polypropylene with broad chemical compatibility
• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Minimal ionic background from the polypropylene housing supports ion chromatography and trace-metal ICP-MS sample preparation.
• Burst pressure rating provides a wide safety margin above the rated maximum operating pressure.

A clean particulate separation keeps your aqueous sample preparation dependable. General-purpose aqueous filtration supports the sample types you handle every day across your water-analysis and general analytical workflows. Start a live chat with our customer support technicians for real-time updates on product availability, lead time, or your order status.

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

Bubble Point (psi)

2.3 bar (33 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.2cm²

Holdup Volume

<100µl

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

1000

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Life Science Prep - Speeds processing of viscous biological solutions, improving laboratory workflow efficiency during busy sample prep days.
• Nucleic Acid Recovery - Processes DNA and RNA extracts with minimal nucleic acid adsorption, preserving yield on the hydrophilic PES surface.
• Serum Filtration - Clarifies serum and plasma samples quickly while retaining critical proteins needed for accurate downstream analytical testing.
• Sample Recovery - Minimizes sample loss in low-protein-binding applications, delivering high yield for precious or rare biological specimens.
• PFAS Water Testing - PES filters process aqueous samples for EPA Method 1633A PFAS testing without added fluorinated background.
• Organic Carbon Testing - Clarifies water samples ahead of DOC and UV254 analysis while keeping organic carbon adsorption to the membrane minimal.