Quantitative (Ashless) Filter Papers-R Series No. 420r
Filtration Speed - Slow Retention-Crystalline, CollectsFine Precipitates <10µm Such As Srso4, Baso4, Hgcrco4 And Colloidal Dispersion, Gravimetric Analysis
Number 420 R: A double washed paper with slow flow rate and high retention efficiency. Recommended for collecting particles ≤5 µm . Gravimetric analysis and for collecting precipitates that tend towards colloidal dispersion.
Number 420 R:
- Used in gravimetric analysis
- Filtration of colloidal solutions
- Used in typical analytical preciprates include barium sulphate (BaSo4 ) Metastannic acid and finely precipitated calcium Carbonate. (CaCo3).
| Parameters | 420 R |
| Particle Retention | 2.5 µm |
| GSM (g/m2) | 98 |
| Thickness | 160 ± 10 µm |
| Bubble Point | 4.5 psi |
| Capillary Rise (mm/min) | 18 mm |
| Herzberg Water Flow (sec/ 100 ml) | 3625 sec |
| Wet Strength | 470 gr. |
| pH (Surface) | 5 |
| Ash Content | 0.01% |
| Cat No. | Size | Nos/Pkt. |
| 420055R(Ideal for Analyser) | 55 mm circles | 100 |
| 420090R | 90 mm circles | 100 |
| 420110R | 110 mm circles | 100 |
| 420125R | 125 mm circles | 100 |
| 420150R | 150 mm circles | 100 |
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