Product Description
Filter Paper Grade 42
The finest particle retention of all Whatman cellulose filter papers makes Grade 42 exceptional for critical gravimetric analysis. Typical precipitates filtered include:
- Barium sulfate
- Metastannic acid
- Finely precipitated calcium carbonate
| 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) |
|---|---|---|---|---|---|---|---|
| 42 | 2.5 | – | 0.007 | 200 | 100 | 5 | 96 |