Product Description
Whatman Filter Paper – Grade 43
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 |
Intermediate retention and flow rate between Nos 40 and 41 |
Medium/Fast |
16 |
L |
0.21 |
0.01 |
This filter paper sits between grades 40 and 41 in terms of particle retention but has twice the flow rate of Grade 40. It’s very useful when you need a good balance between particle retention and speed. Applications include:
- Foodstuffs analysis.
- Soil analysis
- Particle collection for XRF analysis (air pollution monitoring)
- Inorganic analysis in construction, mining, and steel industries
| 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) |
|---|---|---|---|---|---|---|---|
| 43 | 16 | – | 0.007 | 220 | 95 | 62 | 11 |
