Cytiva's Whatman PM2.5 PTFE membrane filters are designed for PM 2.5 ambient air monitoring. These high-purity, thin filters are sequentially numbered and come with chemically resistant polypropylene support rings.

The PTFE membrane is manufactured under cleanroom conditions. The filter's chemically resistant, low chemical background permits sensitive, interference-free determinations. No glues or adhesives are used in manufacturing.

• Polypropylene support rings for robotic air sampling
• Thermally stable design eliminates curling, keeps the membrane flat, and makes the filter robot-friendly
• Sequentially numbered filters
• Low tare mass for accurate gravimetric determinations

Cytiva's Whatman PM2.5 PTFE membrane filters are designed for PM 2.5 ambient air monitoring. These high-purity, thin filters are sequentially numbered and come with chemically resistant polypropylene support rings.

One of the major applications for the PTFE membranes is the clarification of corrosives, solvents, and aggressive fluids. This includes the important requirement in HPLC analysis for sample filtration where any solid particles can cause permanent damage to the column. Air and gas sterilization make use of the hydrophobic characteristics of PTFE membrane filters and their ability to stop aqueous aerosols.

Continuous air monitoring methods require a chemically resistant air sampling filter material that can withstand environmental pollution potentially containing a variety of contaminants and can still deliver accurate results.

PM2.5 PTFE membrane filters from Cytiva business also feature a thermally stable design, making them ideal for ambient air monitoring. These membranes come in a polypropylene support designed for use in robotic air sampling of ambient air pollution.

Alkalinity Max.: 25 µeq/g of filter - Test method: section 2.12 EPA/600/R-94/038b
Particle retention (0.3 mu m) Min.: 99.7% - Test method: ASTM D 2986-95a

Support ring width: 3.68 mm ±0.00 to 0.51 - Test method: template
Total support ring thickness: 0.38 mm ±0.04