Description

Quartz fiber filter papers
Grade QM-A filter paper circles
Grade QM-A
These high-purity quartz (SiO) microfiber filters are used for air sampling in acidic gases, stacks, flues, and aerosols, particularly at high temperatures up to 800oC and in PM2.5/PM10 and trace element analysis. Due to the low level of alkaline earth metals, artifact products of sulfates and nitrates (from SO and NO) are virtually eliminated. QM-A, sequentially numbered according to EPA standards, is suitable for most applications. Grade QM-A filter papers are pre-fired.