PTFE Membrane Filters, 0.22 um, 90mm, Nonsterile, 50/Pk SKU: SF13857

PTFE Membrane Filters - SF13857

Engineered for high retention efficiency and superior chemical stability, the Tisch SF13857 achieves reliable separation results across a broad range of analytical and preparative applications. A uniform PTFE matrix maintains its rated 0.22 cutoff under the pressures and flow conditions encountered during routine laboratory filtration. With this in mind, 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

• Unmatched solvent resistance allows PTFE to process chlorinated hydrocarbons, ketones, and strong oxidizers that destroy other membrane chemistries.
• Excellent for filtering aggressive acids, bases, and non-aqueous solvents.
• Inherent hydrophobicity resists wetting by aqueous solutions, making the membrane suited for gas-phase applications and non-aqueous solvent filtration.
• Permanently hydrophobic and chemically inert, PTFE resists degradation from virtually every solvent, acid, and base encountered in laboratory applications.
• 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. Addressing this directly, 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. Take control of your sample preparation variables and ensure that your data reflects the true nature of your work, rather than the quality of your consumables.

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

Bubble Point (psi)

≥18.9 psi (IPA, 25°C)

Color

White

Diameter

90mm

Extractables

Very Low

Filtration Area

63.62cm²

Flow Rate

≥27 mL/min/cm²

Grid (Yes/No)

No

Grid Color

50

Incompatibility

63.59cm²

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Temperature (°C)

120°C

Membrane Thickness (µm)

20-50um

Pack Count

50

pH Range

1-14pH

Pore Size (µm)

0.22

Sterility

Nonsterile

Sterilization

Autoclave

Support Material

PP

Weight

0.27

Wettability

Hydrophobic

• Off-Gas Analysis - Filters exhaust gases from fermentation vessels, protecting analyzers from moisture and foam while passing metabolic gases.
• Headspace Analysis - Protects gas chromatography injectors by filtering volatile organic samples without extracting background contaminants.
• Aggressive Solvent Prep - Filters extremely corrosive acids and bases in reusable glass holders, offering unmatched chemical inertness in the lab.
• Trace Metal Sampling - Used in clean-room environments to filter samples for ICP-MS, ensuring no metallic leachables contaminate the results.
• Aerosol Venting - Acts as a hydrophobic barrier in disc holders, preventing moisture entry while allowing sterile air to pass into tanks.
• PM2.5 Air Monitoring - The regulatory standard for weighing fine air particulates, ensuring minimal moisture absorption affects the final mass.