Filtry ilościowe bezpopiołowe Grade 40
Filtry o wysokiej czystości, papiery filtracyjne ogólnego zastosowania do analiz ilościowych. Są odpowiednie do różnych zastosowań analitycznych.
Whatman™ Grade 40 high-purity filters are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.

• High-purity filters contain 0.007% maximum ash content
• Medium nominal particle retention rating of 8 µm
• Medium filtration speed (Herzberg 340 s)
• Particularly useful for gravimetric analysis

We offer a range of Whatman™ ashless filter paper for your gravimetric analysis needs. See our other ashless grades to find the right filter for your sample, or use our hardened ashless grades if your analysis involves strong acid/alkali suspensions.

Applications for high-purity Grade 40 filters
High-purity filters support accurate analysis in applications sensitive to very low levels of background contamination and in gravimetric analysis where ash content might affect weight measurements of combusted samples. High-purity Whatman™ Grade 40 ashless paper is suited to:

• Soil analysis, when separating solid matter from aqueous extracts
• Quantitative determination of milk sediment
• Use as a clean-up filter for solutions prior to atomic absorption (AA) spectrometry
• Analysis of constituent components in cements, clays, iron, and steel products
• Collection of trace elements and radionuclides from the atmosphere
Filtry ilościowe bezpopiołowe Grade 40
Filtry ilościowe bezpopiołowe Grade 40
Grade Grade 40 
Type Ashless 
Typical Particle Retention in Liquid 8 µm 
Nominal Thickness 210 µm
Typical water flow rate 25 ml/min 
Nominal Basis Weight 95 g/m2
Nominal Air Flow Rate 21 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. Gravimetric analysis for numerous components in cements; clays; iron; and steel products. As a primary filter for separating solid matter from aqueous extracts in general soil analysis. Quantitative determination of sediments in milk and as a pure analytical grade clean-up filter for solutions prior to AA spectrometry. Also used as a high-purity filter in the collection of trace elements and radionuclides from the atmosphere. 
Product Product Name Dimensions
1440-012 Grade 40 Ashless Filter Paper for Pollution Analysis; 12.7 mm circle (400 pcs) 12.7 mm
1440-032 Grade 40 Ashless Filter Paper for Pollution Analysis; 32 mm circle (100 pcs) 32 mm
1440-042 Grade 40 Ashless Filter Paper for Pollution Analysis; 42.5 mm circle (100 pcs) 42.5 mm
1440-047 Grade 40 Ashless Filter Paper for Pollution Analysis; 47 mm circle (100 pcs) 47 mm
1440-055 Grade 40 Ashless Filter Paper for Pollution Analysis; 55 mm circle (100 pcs) 55 mm
1440-070 Grade 40 Ashless Filter Paper for Pollution Analysis; 70 mm circle (100 pcs) 70 mm
1440-090 Grade 40 Ashless Filter Paper for Pollution Analysis; 90 mm circle (100 pcs) 90 mm
1440-110 Grade 40 Ashless Filter Paper for Pollution Analysis; 110 mm circle (100 pcs) 110 mm
1440-125 Grade 40 Ashless Filter Paper for Pollution Analysis; 125 mm circle (100 pcs) 125 mm
1440-150 Grade 40 Ashless Filter Paper for Pollution Analysis; 150 mm circle (100 pcs) 150 mm
1440-185 Grade 40 Ashless Filter Paper for Pollution Analysis; 185 mm circle (100 pcs) 185 mm
1440-240 Grade 40 Ashless Filter Paper for Pollution Analysis; 240 mm circle (100 pcs) 240 mm
1440-320 Grade 40 Ashless Filter Paper for Pollution Analysis; 320 mm circle (100 pcs) 320 mm
1440-329 Grade 40 Ashless Filter Paper for Pollution Analysis; 30 mm circle (100 pcs) 30 mm
1440-6168 Grade 40 Ashless Filter Paper for Pollution Analysis; 450 mm circle (100 pcs) 450 mm
1440-917 Grade 40 Ashless Filter Paper for Pollution Analysis; 460 × 570 mm sheet (100 pcs) 460 x 570 mm