Filter Circles, Qualitative, Grade 4
Extremely fast filtering with excellent retention of coarse particles and gelatinous precipitates such as ferric hydroxide and aluminium hydroxide. Very useful as a rapid filter for routine clean-up of biological fluids or organic extracts during analysis. Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
|Particle retention:||20 to 25 µm|
|Filtration speed:||37 s|
|Weight:||96 g / m2|