GD/X 25mm Syringe Filter, PES, 0.2um (150 pcs)
Whatman SKU: 6905-2502

Whatman GD/X Polyethersulfone (PES) Syringe Filters, 0.2 µm, 25 mm, 150/Pk - 6905-2502

Whatman ties GD/X prefiltration performance to one closely held fiber-grade standard applied at every production run, keeping results repeatable from one manufacturing lot to the next. Sterilizing-grade syringe filters deliver sterile-grade retention as a single-use format, eliminating the autoclaving and cleaning cycle a reusable sterile filtration setup would require. PES's open pore layout leaves proteins less surface to contact and loads aqueous buffers with zero pre-wetting delay. Low-extractable polypropylene keeps sample purity intact through the filtration pass and sustains its dimensional form through high-temperature filtration workflows. For workflows requiring validated sterile-grade performance, point-of-use retention meets it without a separate sterilization step.

Membrane Characteristics

• DNA and RNA pass through with negligible adsorptive loss
• Sterilizing-grade PES membrane lots are challenge-tested against Brevundimonas diminuta to qualify 0.2 micron retention
• Chemical breadth spans alcohols, glycols, and aqueous buffers
• Sulfone backbone's hydrolytic stability tolerates repeated autoclave steam sterilization cycles
• Mechanical strength keeps the matrix intact under vacuum or pressure

Housing Characteristics

• Translucent housing wall allows visual confirmation of sample flow during filtration
• Inert polyolefin wall contributes minimal sample adsorption to the filtrate
• Thermal-bonded construction keeps adhesives out of the fluid path
• Polypropylene housing withstands operating temperatures up to 121°C without softening or dimensional distortion.

Upstream clarification pays for itself by keeping your columns clear and your analytical day on schedule. Upstream sample clarification keeps your separations clean and reproducible so your filtrate reaches the column clean. Ask how Whatman's track record as a proven brand supports standardizing your filtration workflow.

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

Bubble Point (psi)

3.4 bar (50 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Flow Rate

46

Holdup Volume

1.4ml

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

150

Pore Size (µm)

0.2

Prefilter (Yes/No)

Yes

Prefilter Material

Glass Microfiber (GMF)

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.
• Cell Culture - Reduces the risk of mycoplasma contamination in growth media, supporting healthier cell lines and more reliable experimental outcomes.
• Pesticide Residue Testing - PES membranes improve polar pesticide recovery in food-safety LC-MS/MS testing versus hydrogen-bonding nylon.
• Content Uniformity - Clarifies dense pharmaceutical samples easily, ensuring consistent results in uniformity testing without filter blockage.
• PFAS Water Testing - PES filters process aqueous samples for EPA Method 1633A PFAS testing without added fluorinated background.
• Sample Recovery - Minimizes sample loss in low-protein-binding applications, delivering high yield for precious or rare biological specimens.