Quantitative Filter Paper, 70 mm dia, Cotton Linters, Grade 40
Quantitative Filter Paper, 70 mm dia, Cotton Linters, Grade 40, Ashless Grade Type, Circle Format, 210 µm Thickness, 8 µm Particle Retention in Liquid, 95 g/m2 Nominal Basis Weight, 340 secs/100 ml (Herzberg) Filtration Speed
- Manufacturer Part No: 1440-070
- SECO Part No: 12-4810-03
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Whatman™ Grade 40 high-purity filters from Cytiva’s Life Sciences business are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
| Diameter | : | 70 mm |
| Grade | : | Grade 40 |
| Material | : | High-quality Cotton Linters |
| Ash Content | : | 0.007% |
| Sterility | : | Non-sterile |
| Grade Type | : | Ashless |
| Type | : | Quantitative |
| Dry Burst Pressure | : | 110 kPa/16 psi |
| Filtration Speed | : | 340 sec/100 ml (Herzberg) |
| Filtration Speed | : | 995 sec/100 ml (Herzberg) |
| Format | : | Circle |
| Nominal Air Flow Rate | : | 21 sec/100 ml/in2 |
| Nominal Basis Weight | : | 95 g/m2 |
| Particle Retention in Liquid | : | 8 µm |
| Properties | : | Medium |
| Thickness | : | 210 µm |
| Typical Water Flow Rate | : | 25 ml/min |
| Wet Burst Pressure | : | 2 kPa/0.29 psi |
| Alpha Cellulose Content | : | =98% |
| Loading Capacity | : | N |
High-purity filters contain 0.007% maximum ash contentMedium nominal particle retention rating of 8 µmMedium filtration speed (Herzberg 340 secs)Particularly useful for gravimetric analysisFor soil analysis, when separating solid matter from aqueous extractsQuantitative determination of milk sedimentUse as a clean-up filter for solutions prior to atomic absorption (AA) spectrometryFor analysis of constituent components in cements, clays, iron and steel productsCollection of trace elements and radionuclide's from the atmosphere