WHA12040185

Whatman^® Prepleated Qualitative Filter Paper, Grade 4V

circles, diam. 18.5 mm, pack of 100

• UNSPSC Code: 41104900
• NACRES: NB.24

Properties

• material: cellulose ; circles
• feature: Grade 4V
• packaging: pack of 100
• manufacturer/tradename: Whatman 1204-0185
• parameter: 37s/100mL speed (Herzberg)
• diam.: 18.5 mm
• thickness: 205 μm
• ash: 0.06%
• pore size: 25 μm retention
• basis weight: 96 g/m²

Description

General description

A prepleated filter paper widely used for general purpose filtration. Has excellent particle retention and a good filtration speed and loading capacity.

• 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.

Features and Benefits

• 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

Legal Information

Whatman is a registered trademark of Cytiva