Grade 287 ½ Qualitative Filter Paper, Folded (Prepleated)
Kieselguhr prepleated paper with a medium to slow flow rate and dditional adsorption effect.
- Savings in time required to quadrant-fold circles to fit conical filter funnels in repetitive or multiple analyses.
- Decreased overall filtration time because of the extra surface area exposed; the normal slow down of filtration speed due to the loading of particulate is postponed.
- Increased total loading capacity as more filter area is available.
- Maintained flow rate due to the reduction in filter paper contact with funnel side and the self-supporting shape of the filter itself.
- The prepleating does not significantly affect any of the technical data, and the same figures may be used for the flat circles.
Time-saving Whatman qualitative grades are offered in this convenient form, which gives major advantages over flat circles.
Grade 287 ½
Additional adsorption effect e.g. for the separation of very fine semi-colloidal turbidity, for clarifying milk serum, starch solutions, soil suspensions or sugar-containing solutions prior to polarimetry or refractometry.
Specifications:
- Grade: Grade 287 ½
- Grade Type: Folded (Prepleated)
- Typical Thickness: 360 µm
- Basis Weight: 154g/m2
- Filtration Speed (Herzberg): Approx. 330s
- Properties: Kieselguhr
Ordering Information:
| Cat. No. |
Diameter (mm.) |
Qty. |
| 10310244 |
Qualitative Filter Paper, 125 mm |
50/pk |
| 10310245 |
Qualitative Filter Paper, 150 mm |
50/pk |
| 10310247 |
Qualitative Filter Paper, 185 mm |
50/pk |
