材料
cellulose
circles
特點
Grade 4V
包裝
pack of 14
製造商/商標名
Whatman 1204-270
參數
37s/100mL speed (Herzberg)
直徑
27 mm
厚度
205 μm
灰分
0.06%
孔徑
25 μm retention
基重
96 g/m2
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一般說明
A prepleated filter paper widely used for general purpose filtration. Has excellent particle retention and a good filtration speed and loading capacity.
Grade 4V: 25 um
Also available in flat stock form as Grade 4.
- 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 4V: 25 um
Also available in flat stock form as Grade 4.
特點和優勢
- Very Fast flow rate
- Retention of coarse and gelatinous precipitates
- Nominal particle retention rating of 20–25 µm
- Fast filtration speed (Herzberg 37 s)
- Fluted (pre-pleated) for compatibility with conical filter funnels without the need for further folding
法律資訊
Whatman is a registered trademark of Cytiva
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