Whatman 1004-110 Quantitative Filter Paper Circles, 20-25 Micron, 3.7 s/100mL/sq inch Flow Rate, Grade 4, 110mm Diameter (Pack of 100)
- Used in qualitative analytical techniques to determine and identify materials.
- provides excellent retention of coarse particles (20-25µm) and gelatinous precipitates such as ferric hydroxide and aluminium hydroxide.
- Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical.