PTFE Membrane, TE Range (TE 35), 0.2um Pore Size, 25mm Circle (50 pcs) SKU: 10411405

PTFE Membrane Filters - 10411405

Designed to deliver reproducibility and confidence across critical sample types, the Whatman 10411405 provides the filtration consistency that method validation demands. On the performance side, quality-controlled manufacturing ensures the filtration medium delivers the retention efficiency and throughput that demanding laboratory protocols require. In sum, from raw polymer through final inspection, the manufacturing process is designed to ensure that every membrane disc meets the performance specifications of its grade designation.

Material Specifications

• Unmatched solvent resistance allows PTFE to process chlorinated hydrocarbons, ketones, and strong oxidizers that destroy other membrane chemistries.
• Permanently hydrophobic and chemically inert, PTFE resists degradation from virtually every solvent, acid, and base encountered in laboratory applications.
• Temperature stability exceeding 260°C makes PTFE the preferred membrane for hot gas sampling and elevated-temperature solvent filtration.
• Excellent for filtering aggressive acids, bases, and non-aqueous solvents.
• Require pre-wetting with alcohol before filtering aqueous solutions.

Air monitoring and stack emissions sampling demand a filter medium that withstands the thermal and chemical conditions at your collection point — the material properties described above define the operating envelope for your application. In these cases, the non-stick surface of PTFE minimizes sample adhesion during filtration, improving your recovery of viscous or high-value samples where every microliter of filtrate matters to downstream yield calculations. 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)

14.5psi (IPA)

Color

white

Diameter

25mm

Extractables

very low

Filtration Area

4.91cm²

Flow Rate

2 L (Air)

Grid (Yes/No)

No

Material

Polytetrafluoroethylene (PTFE)

Maximum Operating Pressure

Holder-dependent

Maximum Operating Temperature (°C)

120°C

Membrane Thickness (µm)

165um

Pack Count

50

pH Range

1-14

Pore Size (µm)

0.2

Sterility

Nonsterile

Sterilization

Autoclavable at 121°C for 30 mins

Support Material

Polypropylene Backing

Wettability

Hydrophobic

• Aggressive Solvent Prep - Filters extremely corrosive acids and bases in reusable glass holders, offering unmatched chemical inertness in the lab.
• 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.
• 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.
• Bio-fluid Degassing - Allows gas to escape from microfluidic channels while retaining aqueous liquids, preventing air locks in the system.