| Grade |
Grade 40 |
| Format |
Circles |
| Type |
Ashless |
| Typical Particle Retention in Liquid1 |
8 µm |
| Nominal Thickness |
210 µm |
| Typical water flow rate2 |
25 ml/min |
| Nominal Basis Weight |
95 g/m² |
| Nominal Air Flow Rate |
21 s/100 mL/in² |
| Nominal Ash Content3 |
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. |
| Dimensions |
Ø 150 mm |
