Grade QM-A Quartz Air Sampling Filter Paper

High purity quartz (SiO2) microfibre filters are used for air sampling in acidic gases, stacks, flues and aerosols, particularly at high temperatures up to 500°C and in PM10 testing. Because of the low level of alkalin earth metals, "artifact" products of sulfates and nitrates (from SO2 and NO2) are virtually eliminated. 8 x 10 in. sheets of QM-A type filters are available...