Pura Disc 25mm PES Syringe Filters, 1.0um, 200 Pk
Whatman SKU: 6781-2510

Whatman Puradisc Polyethersulfone (PES) Syringe Filters, 1 µm, 25 mm, 200/Pk - 6781-2510

Whatman's filtration expertise, refined across a century-plus of disciplined manufacturing, has made its name synonymous with laboratory-grade quality worldwide. Individually packaged and pre-tested, a syringe filter needs no functional check before use the way a shared reusable holder does. The PES membrane clarifies particulates at the rated pore size while needing a surface treatment before its polysulfone base wets and tolerates aliphatic alcohols, glycols, and aqueous buffers. The PP housing stays inert across common laboratory solvents and buffers in routine use and holds its geometry through sample filtration at temperatures up to 121°C. When method reproducibility rests on consistent sample prep, syringe filtration holds that standard injection after injection.

Technical Specifications

• Non-ionic surface avoids charge-driven protein binding of positively and negatively charged membrane types
• Sulfone backbone's hydrolytic stability tolerates repeated autoclave steam sterilization cycles
• PFAS extractables test non-detectable under EPA Method 537.1
• Non-hydrogen-bonding surface avoids the polar adsorption nylon's amide backbone causes
• Chemical breadth spans alcohols, glycols, and aqueous buffers

Housing Specifications

• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Inert polyolefin wall contributes minimal sample adsorption to the filtrate
• Minimal extractable release from the housing supports sensitive analytical work downstream
• Burst pressure rating provides a wide safety margin above the rated maximum operating pressure.

Filtering buffers, reagents, and aqueous samples keeps your preparation moving and consistent. General-purpose aqueous filtration supports the sample types you handle every day so you can standardize one filter across most aqueous methods. Start a live chat with our customer support technicians for quick answers to your compatibility, sizing, and sterility questions.

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

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

200

Pore Size (µm)

1

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Biological Assays - Protects sensitive enzymatic and antibody-based assays from particulate interference without adsorbing critical reagents.
• Urine Drug Screening - Clarifies protein-poor urine samples for dilute-and-shoot LC-MS/MS toxicology testing without adsorbing target drug analytes.
• Serum Filtration - Clarifies serum and plasma samples quickly while retaining critical proteins needed for accurate downstream analytical testing.
• PFAS Water Testing - PES filters process aqueous samples for EPA Method 1633A PFAS testing without added fluorinated background.
• Nucleic Acid Recovery - Processes DNA and RNA extracts with minimal nucleic acid adsorption, preserving yield on the hydrophilic PES surface.
• Biological Fluids - Filters buffers and biological fluids efficiently, using the PES membrane to maximize flow and minimize non-specific binding.