Qualitative Filter Papers-Grade 6: 3μm

Offers fine particle retention and high flow rate, as well as good loading capacity.

Used for high-efficiency general purpose laboratory filtration, including water pollution monitoring of effluents, for filtration of water, algae and bacteria cultures, food stuff analyses, protein filtration, and radioimmunoassay of weak ß emitters.

Recommended for gravimetric determination of airborne particulates, stack sampling, and absorption
methods of air pollution monitoring.

Grade 41: 20 μm*
The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g. iron or aluminum hydroxides).

Also used in quantitative air pollution analysis as a paper tape for impregnation when
determining gaseous compounds at high flow rates.