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WHA1204320

Whatman® Prepleated Qualitative Filter Paper, Grade 4V

circles, diam. 32 cm, pack of 100

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About This Item

UNSPSC Code:
41104900
NACRES:
NB.24

material

cellulose
circles

feature

Grade 4V

packaging

pack of 100

manufacturer/tradename

Whatman 1204-320

parameter

37s/100mL speed (Herzberg)

diam.

32 cm

thickness

205 μm

ash

0.06%

pore size

25 μm retention

basis weight

96 g/m2

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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

Certificates of Analysis (COA)

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