TE-QMA4 4 Inch Quartz Microfiber QMA Filters for PUF Sampling SKU: TE-QMA4

The TE-QMA4 quartz microfiber filters are high-purity silica (SiO₂) filters designed specifically for air sampling in polyurethane foam (PUF) samplers. These filters collect airborne particulates in acidic gases, stacks, flues and aerosols, particularly at high temperatures up to 500°C, making them essential for PUF sampling systems used in ambient air quality monitoring.

Technical Specifications

• Diameter: 4 inches (101.6 mm)
• Pore Size: 2.2 µm
• Material: High-purity quartz (SiO₂) microfiber
• Maximum Operating Temperature: 500°C
• Package: 100 filters per box
• Sequential numbering per EPA standards

PUF Sampling Applications

These QMA filters are designed to meet requirements for EPA Compendium Methods TO-4A, TO-9A, and TO-13A, which specify dual-stage sampling for semi-volatile organic compounds (SVOCs). In PUF sampling systems, the QMA filter captures airborne particulates in the upper chamber while polyurethane foam in the lower chamber traps vapor-phase contaminants. Both filter and foam are extracted together to provide accurate measurement of total contaminant concentrations.

Low Artifact Formation

Due to the low level of alkaline earth metals, "artifact" products of sulfates and nitrates (from SO₂ and NO₂) are virtually eliminated. This makes the filters applicable for particulate monitoring and heavy metal analysis, providing more accurate results in contaminated air sampling environments.

Compatibility

The TE-QMA4 filters are compatible with Tisch Environmental PUF samplers and other 4-inch diameter sampling systems. These Grade QM-A filters are widely used in air sampling applications including PM-10 sampling and analysis. The 4-inch diameter makes them suitable for high-volume air sampling applications where larger collection areas are required.

Quality and Compliance

QM-A filters come sequentially numbered according to EPA standards and are suitable for most air sampling applications. Each box contains 100 individually numbered filters, ensuring traceability and compliance with regulatory sampling protocols. The high-purity quartz construction provides consistent performance and reliable results for ambient air quality monitoring programs.