Whatman GD/XP Nylon Syringe Filters, 0.45 µm, 25 mm, 150/Pk
Whatman SKU: 6970-2504

Whatman GD/XP Nylon Syringe Filters, 0.45 µm, 25 mm, 150/Pk - 6970-2504

Whatman positions the GD/XP prefilter stack to intercept particulate before the final membrane, extending throughput while limiting the extractable metal load a glass-based prefilter would add. Because each syringe filter is dedicated to one sample, a failed or contaminated filtration never delays the next analyst's run waiting on a shared holder. Nylon delivers sharp particle cutoff at the rated pore size while holding dimensional stability under rated backpressure and ships in economical bulk non-sterile packaging. Thermal-bonded PP construction leaves no seam for sample to bypass the membrane while routing flow to minimize backpressure in service and holds its geometry through sample filtration at temperatures up to 121°C. Where analytical results depend on clean samples, the preparation step stays consistent from sample to sample through a pre-tested syringe filter.

Membrane Characteristics

• Ester- and alcohol-resistant across common laboratory sample preparations
• Saturation moisture uptake reaches up to 8% by resin weight
• Resin melting point runs near 264°C
• Low extractable contribution to sensitive analytical preparations
• Autoclaving at 121°C for 30 minutes leaves pore structure intact

Housing Characteristics

• Translucent housing wall allows visual confirmation of sample flow during filtration
• Medical-grade polypropylene with broad chemical compatibility
• Thermal-bonded construction keeps adhesives out of the fluid path
• Minimal ionic background from the polypropylene housing supports ion chromatography and trace-metal ICP-MS sample preparation.

Filtering buffers, reagents, and aqueous samples keeps your preparation moving and consistent. General-purpose aqueous filtration supports the sample types you handle every day so you can standardize one filter across most aqueous 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)

2.0 bar (29 psi)

Connection Type

Luer-Lok/ Luer Slip

Diameter

25mm

Filtration Area

4.91cm²

Material

Nylon

Pack Count

150

Pore Size (µm)

0.45

Prefilter (Yes/No)

No

Sterility

Nonsterile

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Cosmetics Batch Testing - Filters aqueous lotions, serums, and personal care products for particulate QC and potency assay sampling.
• GC Sample Prep - Clarifies aqueous and organic extracts ahead of gas chromatography injection, protecting inlets from particulate fouling.
• Environmental Extract Prep - Clarifies water and soil extracts ahead of trace metals or pesticide-residue analysis for accurate results.
• IC Column Protection - Clarifies aqueous samples ahead of anion and cation analysis, guarding ion-exchange columns against particulate fouling.
• Chemical Analysis - Withstands aggressive bases and alcohols, ideal for tough chemical compatibility filtration challenges in routine analysis.
• Amino Acid Profiling - Clarifies aqueous sample digests for HPLC and LC-MS amino acid analysis in food, nutrition, and fermentation monitoring.