GD/X 25mm Syringe Filter, PES, 0.45um (150 pcs)
Whatman SKU: 6905-2504

Whatman GD/X Polyethersulfone (PES) Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6905-2504

Whatman's expertise in cellulose, glass fiber, and polymeric membrane production guides material selection and quality control. Under hand pressure from the syringe, the membrane captures particulates as the sample passes through. PES delivers sharp particle cutoff at the rated pore size while tolerating aqueous buffers, aliphatic alcohols, and glycols in routine use and draws aqueous samples through without pre-wetting. The PP housing sustains efficient flow on viscous samples and keeps the fluid path low in extractable contamination. For routine sample preparation across many methods, the syringe filter folds clarification into one disposable step.

Technical Specifications

• Stable across the full pH 1 to 14 operating range
• Naturally hydrophilic surface wets without pre-wetting in aqueous applications
• High flow rate with low extractable background for clean preparations
• Broad compatibility with aqueous buffers, aliphatic alcohols, glycols, and strong bases
• Low protein binding preserves dilute analytes for maximum recovery

Housing Specifications

• Optimized internal geometry minimizes backpressure in service
• Thermal-bonded construction keeps adhesives out of the fluid path
• Resists aqueous acids, bases, and alcohols in routine sample prep
• Inert polyolefin wall contributes minimal sample adsorption to the filtrate

Reproducible separations start with samples that reach the column free of particulates. Upstream sample clarification keeps your separations clean and reproducible from sample preparation through final injection. 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)

2.3 bar (33 psi)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Flow Rate

30

Holdup Volume

1.4ml

Material

Polyethersulfone (PES)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

150

Pore Size (µm)

0.45

Prefilter (Yes/No)

Yes

Prefilter Material

Glass Microfiber (GMF)

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Biological Sample Prep - The low protein-binding nature of PES ensures maximum recovery of critical enzymes and proteins
• Ion Chromatography - The extremely low extractable profile of PES provides the clean baselines needed for sensitive IC analysis
• Culture Media Filtration - PES offers the fastest flow rates for viscous culture media while maintaining absolute sterility
• Life Science Applications - Ideal for filtering serum and plasma, where minimizing nonspecific binding is crucial for assay accuracy
• Biological Fluid Analysis - Protects sensitive downstream instruments from removing particulates that can cause system failure
• Environmental Monitoring - Ideal for removing particulates in water and wastewater analysis to ensure regulatory compliance