PTFE Membrane Filters, 0.05um, 25mm, Nonsterile, 200/Pk SKU: SF18038

PTFE Membrane Filters - SF18038

The Tisch SF18038 protects sensitive instrumentation and sample integrity by providing reliable particulate removal with minimal analyte adsorption or background interference. Reproducible separation characteristics define the membrane structure, protecting downstream instruments and preserving sample integrity throughout the filtration process. Controlled production conditions produce membranes with documented pore size distribution and thickness tolerances, supporting method reproducibility across multiple filter lots.

Material Specifications

• Require pre-wetting with alcohol before filtering aqueous solutions.
• Temperature stability exceeding 260°C makes PTFE the preferred membrane for hot gas sampling and elevated-temperature solvent filtration.
• Temperature rating of 60°C provides the thermal headroom required for warm sample processing, heated media preparation, and elevated-temperature analytical methods.
• Unmatched solvent resistance allows PTFE to process chlorinated hydrocarbons, ketones, and strong oxidizers that destroy other membrane chemistries.
• Inherent hydrophobicity resists wetting by aqueous solutions, making the membrane suited for gas-phase applications and non-aqueous solvent filtration.

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. PTFE's thermal stability across a wide operating range means you can filter hot solvents and process elevated-temperature samples without the membrane softening or pore distortion that limits thermoplastic alternatives. Make the decision for consistency and reliability, ensuring that your laboratory maintains its reputation for high-quality, error-free output.

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

Bubble Point (psi)

≥29.0 psi (IPA, 25°C)

Color

White

Diameter

25mm

Extractables

Very Low

Filtration Area

4.91cm²

Flow Rate

≥6 mL/min/cm²

Grid (Yes/No)

No

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Temperature (°C)

60°C

Membrane Thickness (µm)

150-310um

Pack Count

100

pH Range

1-14pH

Pore Size (µm)

0.05

Sterility

Nonsterile

Sterilization

Autoclave

Support Material

PP

Weight

0.07

Wettability

Hydrophobic

• Aerosol Venting - Acts as a hydrophobic barrier in disc holders, preventing moisture entry while allowing sterile air to pass into tanks.
• Cryogenic Filtration - Retains integrity at sub-zero temperatures, making it ideal for filtering liquid nitrogen or chilled reaction solvents.
• PM2.5 Air Monitoring - The regulatory standard for weighing fine air particulates, ensuring minimal moisture absorption affects the final mass.
• Trace Metal Sampling - Used in clean-room environments to filter samples for ICP-MS, ensuring no metallic leachables contaminate the results.
• Off-Gas Analysis - Filters exhaust gases from fermentation vessels, protecting analyzers from moisture and foam while passing metabolic gases.
• Bio-fluid Degassing - Allows gas to escape from microfluidic channels while retaining aqueous liquids, preventing air locks in the system.