Air Sampling Filter Paper

Photo of Whatman QM Quartz Microfibre Air Sampling Filters

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 sequentially numbered according to EPA standards, and are suitable for most applications; QM-B type filters are for use when double thickness and increased strength and retention is required.

Photo of Whatman EPM 2000 Glass Microfiber Air Sampling Filters

Whatman EPM 2000 Glass Microfiber Filters have been developed and produced especially for use in high volume PM-10 air sampling equipment that collects atmospheric particulates and aerosols. It is manufactured from 100% pure borosilicate glass of special purity enabling detailed chemical analysis of trace pollutants to take place with the minimum of interference or background. EPM 2000 filters are available in either a 4.7cm circle filter or an 8 x 10 in. sheet. Both sizes come 100/Box.