Whatman™ Qualitative Filter Papers: Grade 4 Roll
Filters and retains course particles for monitoring air pollution. Whatman™ Qualitative Filter Papers: Grade 4 Roll is used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.
Description and Specification
|Particle Retention||Coarse particles and gelatinous precipitates|
|Dimensions (L x W)||114 x 38mm|
|Pore Size (Metric)||20 to 25μm|