Whatman PTFE PM2.5 Air Monitoring Membrane Filter, 2.0 µm, 46.2 mm, w/Support Ring, Sequentially Numbered, 50 Pack, 7592-104
Whatman PM2.5 PTFE membrane filters are designed for PM2.5 air monitoring. These high-purity, thin filtration devices are sequentially numbered and housed in chemically resistant polypropylene support rings for robotic air sampling.
This product is required with the Tisch Environmental Inc. instruments below.
TE-WILBUR-10, TE-WILBUR-2.5
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Tisch Scientific PTFE PM2.5 Air Monitoring Membrane Filter, 2.0 µm, 46.2 mm, w/Support Ring, Sequentially Numbered, 50 Pack, SF18040Regular Price $459.56 Price $399.62
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PM 2.5 Air Monitoring Membrane Filters
Whatman PM 2.5 Ambient Air Monitoring Filters are composed of 2.0um PTFE membranes with a 46.2mm diameter, combined with a Polypropylene support ring ideal for robotic air sampling. Their thermally-stable design and natural chemical resistance make them suitable to withstand environmental pollutants that may contain an array of contaminants, yet still deliver clear and precise results. The Polypropylene support ring assures a flat membrane that does not curl, and makes the Filter very user-friendly. These Filters feature a low tare mass for accurate gravimetric determinations. They meet the requirements for EPA FRM PM 2.5 under 40 CFR Part 50, Appendix L and come sequentially-numbered.
40 CFR Part 50, Appendix L
40 CFR Part 50, Appendix L calls for a Filter that meets listed parameters in section 6.0. The below table reflects the criteria that each lot of Tisch Scientific SF18040 PM2.5 Ambient Air Monitoring Filters are tested against for quality assurance, next to this criteria is the referenced section number from 40 CFR Part 50, Appendix L that calls for these parameters.
| Criteria | 7592-104 Characteristic | Range/Test Method | 40 CFR Part 50, Appendix L Section |
| Filter Media | PTFE Teflon | N/A | 6.2 |
| Filter Thickness | 40 µm | ±10 | 6.5 |
| Filter Diameter | 46.2 mm | ±0.25 | 6.1 |
| Filter Pore Size | 2 µm | ASTM F 316-94 | 6.4 |
| Total Support Ring Thickness | 0.38 mm | ±0.04 | 6.3 |
| Support Ring – Width | 3.68 mm | ±0.00, -0.51 | 6.3 |
| Particle Retention (0.3 µm) | 99.7% | ASTM D 2986-95a | 6.8 |
| Pressure Drop (0.3 µm) @ 16.67 liters/min. | 30 cm H2O | ASTM D 2986-95a | 6.6 |
| Alkalinity | 25 u eq/g of Filter | EPA/600-R-94/038b,Section 2.12 | 6.10 |
| Weight Loss | <20 ug | Above | 6.9 |
| Loose Particles | <20 ug | Above | 6.9.1 |
| Moisture Pickup | <10 ug | Above | 6.7 |
| Manufacturer | Whatman |
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