Grade 41 Quantitative Paper 18.5CM 1441-185

• Diameter: 18.5cm
• Retention: 20µm
• Fastest ashless filter paper
• Recommended for analytical procedures involving coarse particles or gelatinous precipitates (iron or aluminum hydroxides)
• Used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates

The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides). Also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates. This filter is also available in the Whatman™ Disposable Filter Funnel. Retention: 20-25µm. Diameter: 18.5cm.