| Parameter | Grade 2 Qualitative Filter Paper Standard Grade, circle, 42.5 mm |
|---|---|
| Application | Used for monitoring specific contaminants in the atmosphere and in soil testing. |
| Diameter | 42.5 mm |
| Grade | Grade 2 |
| Grade Type | Standard |
| Material | Cellulose |
| Nominal Ash Content1 | 0.06% |
| Nominal air flow rate | 20 s/100 ml/in² |
| Nominal basis weight | 97 g/m² |
| Nominal thickness | 190 µm |
| Typical Particle Retention in Liquid2 | 8 µm |
| Typical Trace Element Levels | Aluminium 3.6 µg/g Antimony <0.5 µg/g Arsenic <0.5 µg/g Barium <0.5 µg/g Boron <1 µg/g Calcium 27.5 µg/g Chromium 1 µg/g Copper 0.9 µg/g Iron 13.7 µg/g Lead <0.5 µg/g Magnesium 21 µg/g Manganese <0.5 µg/g Mercury <0.5 µg/g Potassium 6.2 µg/g Silicon 8.8 µg/g Sodium 32.3 µg/g Zinc 58.3 µg/g |
| Typical water flow rate3 | 38 ml/min |
| Format | Circles |
| Dimensions | Ø 42.5 mm |
