Cytiva Whatman Filter Circle gr 41 150mm/100

Whatman Grade 41 environmental pollution papers are among the fastest filter papers in the Whatman ashless range. This gravimetric filter is well suited for quantitative analysis of soil and air.

• Extremely low ash content (0.007% ash maximum)
• 20 µm nominal particle retention rating
• Fast filtration speed (Herzberg 54 s)
• Commonly used for routine air pollution analysis and soil pollution analysis

Aside from Grade 41 environmental pollution papers, Whatman quantitative paper comes in a variety of particle retentions, filtration speeds, and filter thicknesses to provide you with the appropriate filter for your precipitate. Also see our hardened ashless grades for analysis requiring the use of strong acids or bases.

Fast Ashless Paper for Pollution Analysis

Whatman Grade 41 filters are suitable for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates.

Grade 41 filters are also commonly used in preparing solid environmental samples (e.g., soils, sludges) for metals analysis after nitric acid digestion. Grade 41 is available in a convenient, disposable, 47 mm filter funnel with a 250 ml capacity. The 47 mm diameter filter can be easily removed for further analysis or culturing.

Whatman Product Code	1442-150
Material	Cotton
Filter Media	Cellulose
Grade	41
Size	150 mm Diameter
Typical Particle Retention in Liquid	20 µm
Thickness	215 µm
Basis Weight	85 g/m^2
Ash Content	≤0.007%
Air Flow Rate	4 s/100 mL/in^2
Water Flow Rate	254 ml/min
Alpha Cellulose Content	≥98%
Format	Circles
Pack Size	100