Laboratory
323
What is Grade 323?
This fast flow rate grade with very good retention is a tighter version of Grade 325. A general purpose creped filter has a rough surface for less critical routine analysis. It is often found in the food industry and is widely used to assay sucrose in cane sugar and within pharmaceutical laboratories for routine filtration. These extremely strong filter papers have a high wet strength due to the addition of a small quantity of chemically stable resin. Normal qualitative applications will not introduce any significant impurities into the filtrate. The resins do however, contain nitrogen so these grades should not be used in Kjeldahl estimations etc. Some wet strengthened grades are available in folded (pre-pleated) forms.
| Whatman Cross Reference | = No.91 |
|---|---|
| Speed class | Fast Filtration |
| Thickness (mm) | 0.14 |
| Pore size (μM) | 20-30 |
| Weight (g/m²) | 64 |
| Filtration Speed (sec*) | 30 |
| Burst Strength (Kg/cm²) | 1.6 |
| Diameter (mm) | Product Code |
|---|---|
| mm: 55 | Product code: 323055 |
| mm: 70 | Product code: 323070 |
| mm: 90 | Product code: 323090 |
| mm: 110 | Product code: 323110 |
| mm: 125 | Product code: 323125 |
| mm: 150 | Product code: 323150 |
| mm: 185 | Product code: 323185 |
| mm: 240 | Product code: 323240 |
| mm: 300 | Product code: 323300 |
| mm: 320 | Product code: 323320 |