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Thumbnail Filmstrip of PTFE Membrane Filters, 0.22 um, 25mm, Nonsterile, with PP substrate 500 /Pk, SPEC20225 Images
PTFE Membrane Filters - SPEC20225
Engineered for high retention efficiency and superior chemical stability, the Tisch SPEC20225 achieves reliable separation results across a broad range of analytical and preparative applications. Constructed for reliable operation, reproducible separation characteristics define the membrane structure, protecting downstream instruments and preserving sample integrity throughout the filtration process. Working in concert, consistent surface properties across the full membrane area support uniform particle capture and reliable results in gravimetric, microscopic, and culture-based analytical workflows.
Material Specifications
- Maximum operating temperature of 120°C accommodates warm sample filtration and elevated-temperature processes that exceed the limits of standard devices.
- Bulk packaging format provides cost-effective access for high-volume laboratories performing non-critical filtration and sample preparation.
- Permanently hydrophobic and chemically inert, PTFE resists degradation from virtually every solvent, acid, and base encountered in laboratory applications.
- Water-repellent membrane surface sustains airflow in venting applications while providing a defined barrier against liquid passage.
- Near-zero extractable levels ensure PTFE membranes contribute no measurable background to mass spectrometry or trace analytical workflows.
Maintaining accreditation under ISO 17025 or similar quality frameworks requires documented traceability at every step — the specification compliance of each membrane lot supports your ongoing audit readiness. In this context, for aggressive solvent recovery and waste stream filtration, PTFE's inertness allows you to reclaim expensive solvents through filtration without introducing extractable contamination from the filter medium into your recovered material. Elevate the quality of your analytical data today by standardizing on a filtration product built to meet the exact specifications of your applications.
For more information about chemical compatibility, please review our Chemical Compatibility Chart.
- Bubble Point (psi)
- ≥18.9 psi (IPA, 25°C)
- Color
- White
- Diameter
- 25mm
- Extractables
- Very Low
- Filtration Area
- 4.91cm²
- Flow Rate
- ≥27 mL/min/cm²
- Grid (Yes/No)
- No
- Material
- Polytetrafluoroethylene (PTFE)
- Maximum Operating Temperature (°C)
- 120°C
- Membrane Thickness (µm)
- 20-50um
- Pack Count
- 100
- pH Range
- 1-14pH
- Pore Size (µm)
- 0.22
- Sterility
- Nonsterile
- Sterilization
- Autoclave
- Support Material
- PP
- Wettability
- Hydrophobic
- Cryogenic Filtration - Retains integrity at sub-zero temperatures, making it ideal for filtering liquid nitrogen or chilled reaction solvents.
- Headspace Analysis - Protects gas chromatography injectors by filtering volatile organic samples without extracting background contaminants.
- Off-Gas Analysis - Filters exhaust gases from fermentation vessels, protecting analyzers from moisture and foam while passing metabolic gases.
- PM2.5 Air Monitoring - The regulatory standard for weighing fine air particulates, ensuring minimal moisture absorption affects the final mass.
- Aerosol Venting - Acts as a hydrophobic barrier in disc holders, preventing moisture entry while allowing sterile air to pass into tanks.
- Trace Metal Sampling - Used in clean-room environments to filter samples for ICP-MS, ensuring no metallic leachables contaminate the results.