Pura Disc 25mm GF/F GMF Syringe Filters, 0.7um, 50 Pk
Whatman SKU: 6825-2517

Whatman Puradisc Glass Fiber (GF) Syringe Filters, 0.7 µm, 25 mm, 50/Pk - 6825-2517

Whatman's filtration expertise, refined across a century-plus of disciplined manufacturing, has made its name synonymous with laboratory-grade quality worldwide. Sample preparation for chromatography often ends with a syringe filter on the path to the vial. The glass microfiber matrix accepts water-based samples on contact and delivers nominal retention as a depth medium. The PP housing sustains efficient flow on viscous samples while keeping the sample chemically unaltered across the pass and presses snugly against the membrane during the pass. When chromatographic methods demand particle-free injections, the column stays clean from run to run, protecting method performance and column life.

Technical Specifications

• Surface silanol groups attract water molecules for immediate aqueous wetting
• Inorganic construction suits demanding sample-preparation chemistries
• Biologically inert borosilicate fiber with broad chemical compatibility
• Extends filterable sample volume three to seven times versus unprotected media
• Autoclave steam sterilization at 121°C leaves structural integrity intact

Housing Specifications

• Housing tolerates elevated-temperature aqueous and solvent sample filtration up to about 80°C without softening.
• Dilute aqueous acids, bases, and alcohols used in sample prep do not degrade the polypropylene housing
• Optimized internal geometry minimizes backpressure in service
• Rigid polypropylene body maintains its geometry through routine filtration pressure

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. Ask how Whatman's track record as a proven brand supports standardizing your filtration workflow.

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

Connection Type

Luer-Lok/ Luer Slip

Construction

Glass Microfiber (Binder Free)

Diameter

25mm

Filtration Area

4.91cm²

Flow Rate

Fast

Material

Glass Micro Fiber

Maximum Operating Temperature (°C)

550°C

Membrane Thickness (µm)

420µm

Pack Count

50

Pore Size (µm)

0.7

Prefilter (Yes/No)

No

Sterility

Nonsterile

Sterilization

Autoclavable 500°C

Volume Throughput (ml)

Up to 100ml

Wettability

Hydrophilic

• Dissolved Carbon Testing - Glass fiber's nominal 0.7 micron rating defines the standard operational cutoff for dissolved organic carbon analysis.
• Botanical Extract Prep - Glass fiber removes plant cell wall debris from botanical extracts ahead of active constituent and contaminant analysis.
• Industrial Polymer Prep - Glass fiber removes polymer particulates and precipitates from solvent solutions ahead of GPC and rheology analysis.
• Milk and Dairy Analysis - Glass fiber prefiltration removes casein and fat globules from dairy samples ahead of HPLC and ion chromatography.
• Mining Water Compliance - Glass fiber removes mineral sediment from mine drainage and process water ahead of metals and pH compliance testing.
• Air Sampling Extract Prep - Glass fiber removes insoluble particulates from air filter extracts ahead of metals and organic compound analysis.