| Grade |
Grade 540 |
| Format |
Circles |
| Type |
Hardened Ashless |
| Typical Particle Retention in Liquid1 |
8 µm |
| Nominal thickness |
160 µm |
| Typical water flow rate2 |
97 ml/min |
| Nominal basis weight |
85 g/m² |
| Nominal air flow rate |
13 s/100 mL/in² |
| Nominal Ash Content3 |
0.005% |
| Material |
High-quality cotton linters |
| Alpha Cellulose Content Min. |
≥98% |
| Typical Trace Element Levels |
Aluminium 3.4 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 14.7 µg/g Chromium 1.1 µg/g Copper 8.2 µg/g Iron 16.3 µg/g Lead <0.5 µg/g Magnesium 3.3 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 3.7 µg/g Silicon <6 µg/g Sodium 17 µg/g Zinc 87.8 µg/g |
| Application |
Frequently used in the gravimetric analysis of metals in acid/alkali solutions and in collecting hydroxides after precipitation by strong alkalis. |
| Diameter |
42.5 mm |
