Grade 4 Qualitative Paper 18.5CM 1004-185

• 18.5cm Diameter, Pore Size: 20-25µm
• Whatman™ Grade 4 Qualitative Filter Paper
• Used in qualitative analytical techniques to determine and identify materials
• Extremely fast filtering; provides excellent retention of coarse particles (20-25µm) and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide
• Used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical

This Whatman™ 18.5cm grade 4 cellulose filter paper is used in qualitative analytical techniques to determine and identify materials. Extremely fast filtering. It provides excellent retention of coarse particles (20-25µm) and gelatinous precipitates such as ferric hydroxide and aluminum hydroxide. It is very useful as a rapid filter for routine cleanup of biological fluids or organic extracts during analysis. This filter paper is used when high flow rates in air pollution monitoring are required and the collection of fine particles is not critical. Retention: 20-25µm. Dimensions: 18.5cm.