Cytiva Borosilicate Glass Microfiber Filter Paper Circles, 45mm Diameter, Air Sampling Quartz QM-A, pack/100

Cytiva's high-purity quartz microfiber filters are used in many air sampling filter applications, including sampling of acidic gases, stacks, flues, and aerosols. Filters are suitable for PM-10 sampling and analysis.

• Temperature resistant up to 800°C
• Binder-free

Whatman quartz microfiber filters
Because of the low level of alkaline earth metals, "artifact" products of sulfates and nitrates (from SO₂ and NO₂) are virtually eliminated. High-purity quartz microfiber filters are therefore applicable for particulate monitoring and heavy metal analysis.

Whatman QM-A filter circles and sheets
QM-A quartz microfiber filters from Cytiva come in a wide range of circle diameters, as well as 25-piece sheets. QM-A sheets (1851-8866) are sequentially numbered according to U.S. Environmental Protection Agency (EPA) standards and are suitable for most applications.

Specifications:

• Application: Used for air sampling in acidic gases, stacks, flues and aerosols, particularly at high temperatures up to 500° C and in PM-10 testing.Filters for Use in US EPA PM10 Ambient air monitoring.  
• Grade: QM-A
• Diameter: 4.5 cm
• Nominal air flow rate: 6.3 s/100 ml/in²
• Nominal thickness: 475 µm
• Nominal basis weight: 85 g/m²
• Max recommended temperature: 800 °C
• Material: High-purity quartz (SiO₂)
• Format: Circles
• Binder type: Binder free
• Select Product: Circles, Ø 45 mm