Grade QM-A Quartz Filter, circle, 110 mm Grade QM-A circles High-purity quartz (SiO₂) microfiber filters are used for air sampling in acidic gases, stacks, flues and aerosols, particularly at high temperatures up to 500° C and in PM-10 testing. Because of the low level of alkaline earth metals, ''artifact'' products of sulfates and nitrates (from SO₂ and NO₂) are virtually eliminated. QM-A, sequentially numbered according to EPA standards, is suitable for most applications.
Here you can find the cartificat: https://www.gelifesciences.com/en/de/support/quality/certificates
|category||glass fiber filter|
|filter type||glass fiber filter|
|pore size||2.2 µm|