Grade 4V Fluted Filter Paper, FF

GE’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.

• 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

Fluted filter for capturing gelatinous precipitate

Whatman Grade 4V prepleated (fluted) filter paper from GE 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.

Specifications:

• Grade: Grade 4V
• Grade Type: Folded (Prepleated)
• Typical Particle Retention in Liquid: 25 µm
• Typical Water Flow Rate (ml/min) for 9cm diameter: 247
• Nominal Thickness: 210 µm
• Nominal Basis Weight: 92 g/m²
• Material: Cellulose
• Typical Trace Element Levels: Aluminium 3.6 µg/g, Antimony <0.5 µg/g, Arsenic <0.5 µg/g, Barium <0.5 µg/g, Boron <1 µg/g, Calcium 27.5 µg/g, Chromium 1 µg/g, Copper 0.9 µg/g, Iron 13.7 µg/g, Lead <0.5 µg/g, Magnesium 21 µg/g, Manganese <0.5 µg/g, Mercury <0.5 µg/g, Potassium 6.2 µg/g, Silicon 8.8 µg/g, Sodium 32.3 µg/g, Zinc 58.3 µg/g

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