material
cellulose membrane (Kieselguhr paper), circles
sterility
non-sterile
feature
Grade 287 1/2
packaging
pack of 50
manufacturer/tradename
Whatman 10310245, Whatman Article No. 28414165 (US reference)
parameter
330 sec/100 mL speed (Herzberg)
diam.
150 mm
thickness
360 μm
basis weight
161 g/m2
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General description
Kieselguhr prepleated paper with a medium to slow flow rate and additional adsorption effect. 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. Also available in flat stock form as Grade 287.
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. Also available in flat stock form as Grade 287.
Features and Benefits
- 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.
Other Notes
Field of Use : For internal research use only. Products are not intended for diagnostic use or resale.
Legal Information
Whatman is a registered trademark of Cytiva
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