Specifications Table

Product Name – Whatman Polyvent Filter
Quantity/Pack Size – 0.2uM,PTFE (Pack of 1), 0.2uMTF (Pack of 1), 0.2uM,PTFE (Pack of 1), 0.2uMTF (Pack of 1), 0.2uMTF (Pack of 1), 0.2uM,PTFE (Pack of 50), 0.2uM,PTFE (Pack of 10), 0.2uM,PTFE (Pack of 100)
Form – Membrane Disc
Grade – Hydrophobic, Chemically Inert
Application – Sterile Filtration, Gas/Liquid Clarification

Product Overview

The Whatman Polyvent PTFE 0.2?m filter is engineered for high-performance sterile filtration in demanding laboratory environments. Constructed from pure polytetrafluoroethylene (PTFE), this hydrophobic membrane ensures absolute retention of particles ?0.2?m while maintaining exceptional chemical resistance to aggressive solvents, acids, and bases. Its inherent hydrophobicity prevents aqueous solutions from passing through without pre-wetting, making it ideal for gas sterilization and venting applications where moisture sensitivity is critical. The filter’s thermally stable structure (operable up to 260?C) and non-leaching properties guarantee sample integrity, eliminating extractables that could compromise analytical results. Each disc features a smooth, uniform surface for consistent flow rates and minimal pressure drop, optimizing filtration efficiency. The PTFE material’s low protein binding characteristics further enhance its suitability for biological and pharmaceutical applications where sample recovery is paramount. Available in multiple pack sizes to accommodate varying throughput requirements, these filters integrate seamlessly with standard filtration apparatus. Their sterile packaging ensures ready-to-use convenience, eliminating the need for pre-filtration autoclaving in most applications.

FAQs

1. Can Whatman Polyvent PTFE filters be used for both liquid and gas filtration?

These filters are primarily designed for gas filtration due to their hydrophobic nature. For liquid filtration, the membrane requires pre-wetting with alcohol or another compatible solvent to allow aqueous solutions to pass through.

2. What is the maximum operating temperature for these PTFE filters?

The filters maintain structural integrity up to 260?C, making them suitable for high-temperature sterilization processes and applications involving hot gases.

3. Are these filters compatible with organic solvents like acetone or methanol?

Yes, PTFE’s chemical resistance extends to virtually all organic solvents, including acetone, methanol, DMSO, and halogenated hydrocarbons, without degradation or leaching.

4. How should these filters be stored to maintain their performance?

Store in original packaging at room temperature (15-30?C) in a dry environment. Avoid exposure to direct sunlight or humidity, which could potentially affect the hydrophobic properties over prolonged periods.

5. What alternatives exist if I need a hydrophilic version of this filter?

For hydrophilic applications, consider Whatman’s nylon or PES membrane filters with similar pore sizes, though these will have different chemical compatibility profiles compared to PTFE.