GD/XP Syringe Filter, Depth PP Filteration Medium, 0.45um (1500 pcs)
Whatman SKU: 6993-2504

Whatman GD/XP Polypropylene (PP) Syringe Filters, 0.45 µm, 25 mm, 1500/Pk - 6993-2504

Whatman ties GD/XP prefiltration performance to one closely held polypropylene specification applied at every production run, keeping ion-clean results repeatable from lot to lot. Many syringe filters ship with lot-specific quality documentation, giving analysts traceability that an ad hoc bulk filtration setup typically lacks. Polypropylene resists a broad range of organic solvents, acids, and bases in service while keeping binding low and capturing particulates through its depth and stays well suited to solvent-rich, non-aqueous specimens. The polypropylene housing presses snugly against the membrane during the pass while holding its form through high-temperature sample preparation conditions and routes flow to minimize backpressure in service. When chromatographic methods demand particle-free injections, the column stays clean from run to run, protecting method performance and column life.

Membrane Characteristics

• Saturated hydrocarbon backbone resists the hydrolytic degradation common in ester-linked filter media
• Solvent-stable polypropylene handles aliphatic hydrocarbons and common process oils
• Flexible polypropylene fiber matrix adapts to modest pressure cycles without fracture
• Sustains throughput on particulate-laden solvent samples
• Halogen-free composition avoids hazardous fluorine byproducts during incineration

Housing Characteristics

• Thermal-bonded construction keeps adhesives out of the fluid path
• Optimized internal geometry minimizes backpressure in service
• Dilute aqueous acids, bases, and alcohols used in sample prep do not degrade the polypropylene housing
• Translucent housing wall allows visual confirmation of sample flow during filtration

Removing particulates from organic solvents and reagents before they move downstream keeps contamination out of your results. Reliable solvent prefiltration clears particulates from your organic samples so your downstream method starts with a clean sample. Review our Chemical Compatibility Chart, or ask technical service to confirm chemical compatibility for your specific application.

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

Bubble Point (psi)

(Hydrophobic)

Burst Pressure (psi)

75psi

Connection Type

Luer-Lok/ Luer Slip

Construction

Polypropylene

Diameter

25mm

Filtration Area

4.6cm²

Holdup Volume

1.4ml

Material

Polypropylene Depth Filter (DpPP)

Maximum Operating Pressure

75psi

Maximum Operating Temperature (°C)

121°C

Pack Count

150

Pore Size (µm)

0.45

Prefilter (Yes/No)

Yes

Prefilter Material

Polypropylene (10µm + 5µm)

Sterility

Nonsterile

Sterilization

Autoclavable 121°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophobic

• Dilute Acid Sample Prep - Withstands dilute hydrochloric and sulfuric acid streams, enabling acidic sample preparation without membrane attack.
• Cosmetics Ingredient Testing - Filters aqueous and alcohol cosmetic formulations for HPLC quantitation of active and preservative ingredients.
• Trace Metal Analysis Prep - Introduces minimal metal ion background into the filtrate, supporting sample prep ahead of ICP-OES or ICP-MS analysis.
• Battery Electrolyte Analysis - Filters lithium-ion battery electrolytes in carbonate and ether organic solvents for purity and additive testing.
• Petrochemical Sample Prep - Handles aliphatic and light petroleum process streams for GC and GC-MS hydrocarbon speciation and quality testing.
• Hormone and Steroid Testing - Handles alcohol and acetonitrile steroid extraction matrices for HPLC-MS confirmation in pharmaceutical QC labs.