Qualitative Filter Paper, 320 mm dia, Cellulose, Grade 4V

Cytiva's Whatman™ Grade 4V filter paper is well suited for qualitative analysis or general filtration of coarse particles. The fluted filter design increases filtration speed, flow rate, and loading capacity. Fluted filter for capturing gelatinous precipitate. Whatman™ Grade 4V prepleated (fluted) filter paper from Cytiva is frequently used to filter gelatinous precipitate or during general filtration that does not require the collection of fine particles. The filter sheets are also useful for rapid filtration of biological fluids or organic extracts prior to analysis.

Diameter	:	320 mm
Grade	:	Grade 4V
Material	:	Cellulose
Ash Content	:	0.06%
Grade Type	:	Folded (Prepleated)
Type	:	Qualitative
Filtration Speed	:	37 sec (Herzberg)
Nominal Basis Weight	:	92 g/m2
Particle Retention in Liquid	:	25 µm
Properties	:	Very Fast
Thickness	:	210 µm
Typical Water Flow Rate	:	247 ml/min

Very fast flow rateRetention of coarse and gelatinous precipitatesNominal particle retention rating of 20 to 25 µmFast filtration speed (Herzberg 37 secs)Fluted (pre-pleated) for compatibility with conical filter funnels without the need for further foldingUsed when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical