Qualitative Filter Papers-Grade 6: 3μm

Slightly more retentive than Grade 1 with a corresponding increase in filtration time (i.e., slightly slower filtration speed).

More absorbent than Grade 1. In addition to general filtration in the 8 μm particle size range, the extra absorbency is utilized, for example, to hold soil nutrient in plant growth trials.

Also used for monitoring specific contaminants in the atmosphere and in soil testing.

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.