Product Description
Whatman Filter Paper – Grade 41
Quantitative Grade
WET STRENGTH
L – Suitable for gravity or low suction filtration. Care must be taken to prevent rupture of paper
M – Will withstand all normal use on Buchner Funnels or others devices under suction or moderate pressure
H – High wet strength and high chemical resistance
|
Grade No |
Flow rate |
Retention microns |
Wet Strength |
Thickness, mm |
Ash % |
|
|
Ashless |
For filtration of coarse and gelatinous precipitates |
Fast |
20-25 |
L |
0.21 |
0.01 |
This is the fastest quantitative ashless paper. It’s suited for filtering coarse particles and gelatinous precipitates. It also performs well in quantitative air pollution analyses.
| Grade | Typical Particle Retention in Liquid (µm)1 | Filtration Speed Herzberg (s) | Nominal Ash Content (%)3 | Nominal Thickness (µm) | Nominal Basis Weight (g/m2) | Typical Water Flow Rate (mL/min)2 | Nominal Air Flow Rate (s/100 mL/in2) |
|---|---|---|---|---|---|---|---|
| 41 | 20 | – | 0.007 | 215 | 85 | 254 | 4 |
