GD/X 25mm Syringe Filter, PTFE Filteration Medium, 0.45um (150 pcs)
Whatman SKU: 6875-2504

Whatman GD/X PTFE Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6875-2504

Whatman places a fibrous glass mat before the final membrane in every GD/X device, clearing a turbid sample in one pass through the same housing. Many syringe filters ship with lot-specific quality documentation, giving analysts traceability that an ad hoc bulk filtration setup typically lacks. PTFE stays chemically inert against aggressive solvents, strong acids, and alkalis in service and reaches the same absolute retention on every run. Thermal-bonded PP construction leaves no seam for sample to bypass the membrane while routing flow to minimize backpressure in service and sustains its dimensional form through high-temperature filtration workflows. When method reproducibility rests on consistent sample prep, syringe filtration holds that standard injection after injection.

Membrane Characteristics

• Low extractables keep the chromatographic background clean
• Non-wetting pore surface blocks liquid water while passing water vapor freely
• High membrane porosity, 70 to 80 percent void volume, delivers high flow at low pressure
• Inert composition offers no nutrient source for microbial growth
• Solvent tolerance includes full-strength tetrahydrofuran and chlorinated solvents such as dichloromethane

Housing Characteristics

• Medical-grade polypropylene with broad chemical compatibility
• Housing retains dimensional stability and seal integrity through elevated-temperature operation up to 121°C.
• Translucent housing wall allows visual confirmation of sample flow during filtration
• Minimal extractable release from the housing supports sensitive analytical work downstream

Removing particulates from organic solvents and reagents before they move downstream keeps contamination out of your results. Solvent-stream filtration handles the solvents and reagents your methods rely on across the organic solvents and harsh reagents your methods use. Ask our team about Whatman's performance credentials before you commit to a filtration standard requiring documented quality.

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

Bubble Point (psi)

0.6 bar (9 psi) [IPA]

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Holdup Volume

1.4ml

Material

GF/PTFE

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

Hydrophobic

• Environmental Prep - Clears heavy particulate loads from solvent-based soil and sediment extracts, pairing a glass prefilter with a PTFE membrane.
• Spirits Congener Analysis - Clarifies distilled spirits samples ahead of GC analysis, protecting columns from residue during congener profiling.
• Dissolution Testing - Stops the dissolution reaction and clarifies samples, with low API binding for accurate potency quantitation.
• Aggressive Solvents - Clarifies chlorinated hydrocarbons and aromatics without membrane degradation, delivering pure filtrate quality consistently.
• QuEChERS Extract Cleanup - Clears matrix debris from acetonitrile-based pesticide extracts with a glass prefilter ahead of LC-MS/MS analysis.
• Extractables Testing - Clarifies packaging material organic solvent extracts ahead of LC-MS analysis, keeping background low for leachable detection.