Filtry ilościowe bezpopiołowe Grade 41
Papiery stosowane w ochronie środowiska, jedne z najszybszych papierów filtracyjnych w asortymencie papierów bezpopiołowych Whatman. Te grawimetryczne filtry doskonale nadają się do ilościowej analizy gleby i powietrza.
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.
Grade Grade 41 
Type Ashless 
Typical Particle Retention in Liquid 20µm 
Nominal Thickness 215 µm
Typical water flow rate 254 ml/min 
Nominal Basis Weight 85 g/m2
Nominal Air Flow Rate 4 s/100 mL/in2 
Nominal Ash Content 0.007% 
Material High-quality cotton linters 
Alpha Cellulose Content Min. ≥98% 
Typical Trace Element Levels Aluminium 2.5 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 8.3 µg/g Chromium 1.5 µg/g Copper 2 µg/g Iron 12 µg/g Lead <0.5 µg/g Magnesium 4 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 2.3 µg/g Silicon 6.2 µg/g Sodium 16.8 µg/g Zinc 64.5 µg/g 
Application Designed for gravimetric analysis and the preparation of samples for instrumental analysis. 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. 
Product Product Name Dimensions
1441-042 Grade 41 Fast Ashless Filter Paper; 42.5 mm circle (100 pcs) 42.5 mm
1441-047 Grade 41 Fast Ashless Filter Paper; 47 mm circle (100 pcs) 47 mm
1441-050 Grade 41 Fast Ashless Filter Paper; 50 mm circle (100 pcs) 50 mm
1441-055 Grade 41 Fast Ashless Filter Paper; 55 mm circle (100 pcs) 55 mm
1441-060 Grade 41 Fast Ashless Filter Paper; 60 mm circle (100 pcs) 60 mm
1441-070 Grade 41 Fast Ashless Filter Paper; 70 mm circle (100 pcs) 70 mm
1441-090 Grade 41 Fast Ashless Filter Paper; 90 mm circle (100 pcs) 90 mm
1441-110 Grade 41 Fast Ashless Filter Paper; 110 mm circle (100 pcs) 110 mm
1441-125 Grade 41 Fast Ashless Filter Paper; 125 mm circle (100 pcs) 125 mm
1441-150 Grade 41 Fast Ashless Filter Paper; 150 mm circle (100 pcs) 150 mm
1441-185 Grade 41 Fast Ashless Filter Paper; 185 mm circle (100 pcs) 185 mm
1441-240 Grade 41 Fast Ashless Filter Paper; 240 mm circle (100 pcs) 240 mm
1441-320 Grade 41 Fast Ashless Filter Paper; 320 mm circle (100 pcs) 320 mm
1441-6309 Grade 41 Fast Ashless Filter Paper; 25 mm circle (10;000 pcs) 25 mm
1441-866 Grade 41 Fast Ashless Filter Paper; 203 × 254 mm sheet (100 pcs) 203 x 254 mm
1441-917 Grade 41 Fast Ashless Filter Paper;460 × 570 mm sheet (100 pcs) 460 x 570 mm
14418296 Grade 41 Fast Ashless Filter Paper, 32 mm (100 pcs) 32 mm
14416761 Grade 41 Fast Ashless Filter Paper, 55 mm (10000 pcs) 55 mm