GD/X 25mm Sterile Syringe Filter, PVDF Filteration Medium, 0.2um (50 pcs)
Whatman SKU: 6900-2502

Whatman GD/X PVDF Syringe Filters, 0.2 µm, 25 mm, 50/Pk - 6900-2502

Whatman stages multiple glass fiber layers inside the GD/X cartridge to intercept particles in progressive steps, leaving only the smallest fraction to reach the tightly rated final membrane. A sterilizing-grade syringe filter carries manufacturer bacterial retention testing built into the design, giving analysts documented sterile-grade performance without repeating that testing in-house for the format. The hydrophilic PVDF membrane loads aqueous mobile phases on first contact and achieves sterile-grade retention at sub-micron pore sizes. Pre-sterilized polypropylene construction is individually wrapped for direct use in sterile workflows while resisting degradation from routine sample matrices and holds its geometry through sample filtration at temperatures up to 121°C. When sample preparation calls for a sterile filtrate at the point of injection, sterilizing-grade absolute retention delivers it directly, protecting the analytical method from microbial interference.

Membrane Characteristics

• Protein and peptide sample loss to adsorption stays minimal
• Hydrochloric, dilute nitric, and up to 90% sulfuric acid cause no attack
• Mechanically durable membrane holds integrity under filtration pressure
• Gamma irradiation sterilization causes no chain scission unlike polypropylene membranes
• Bacterial challenge testing with Brevundimonas diminuta at 10 million CFU per cm2 confirms sterilizing grade

Housing Characteristics

• Polypropylene density near 0.90 g/cm3 keeps housing weight low relative to denser engineering plastics
• Sterile barrier packaging assures the housing's factory-sterilized state is intact at the point of use.
• PP housing supplied sterile in individual packaging for immediate use in aseptic filtration without bench preparation.
• Medical-grade polypropylene with broad chemical compatibility

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 across your HPLC and UHPLC 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.

Bubble Point (psi)

1.8 bar (26 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Flow Rate

45

Holdup Volume

1.4ml

Material

Polyvinylidene Difluoride (PVDF)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

50

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

Hydrophobic

• Mycotoxin Screening - Clarifies grain and food extracts ahead of HPLC analysis, supporting reliable detection of aflatoxins and other mycotoxins.
• Pharmaceutical QC - Supports routine quality control testing by reliably filtering mild organic solvent mixtures and drug formulations daily.
• Pre-Blot Sample Prep - Ensures ultra-low protein binding for maximum sample recovery ahead of sensitive immunodetection protocols and assays.
• Trace Analysis - Prevents non-specific binding in trace analysis, keeping low-concentration analytes in solution for reliable detection.
• Immunochemistry Research - Delivers exceptional chemical resistance for mild organic mixtures used in sensitive immunochemical research applications.
• High-Particulate Filtration - Integrates a glass microfiber prefilter stack that clears heavy solids, extending membrane life for tough samples.