Grade 40 Ashless Filter Paper for Pollution Analysis
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$31.91
100
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Description
Whatman Grade 40 high-purity filters from Cytiva's business are general-purpose papers for quantitative analysis. Grade 40 filters are suitable for a variety of analytical filtration applications.
Cytiva offers 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. Cytiva's 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 cement, clays, iron, and steel products.
- Collection of trace elements and radionuclides from the atmosphere.
Features
- 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.
Product Specifications
| Manufacturer Part 1440-042: | Diameter 42.5 mm |
|---|---|
| Manufacturer Part 1440-047: | Diameter 47 mm |
| Manufacturer Part 1440-055: | Diameter 55 mm |
| Manufacturer Part 1440-070: | Diameter 70 mm |
| Manufacturer Part 1440-090: | Diameter 90 mm |
| Manufacturer Part 1440-110: | Diameter 110 mm |
| Manufacturer Part 1440-125: | Diameter 125 mm |
| Manufacturer Part 1440-150: | Diameter 150 mm |
| Manufacturer Part 1440-185: | Diameter 185 mm |
| Manufacturer Part 1440-240: | Diameter 240 mm |
| Manufacturer Part 1440-320: | Diameter 320 mm |
| Manufacturer Part 1440-032: | Diameter 32 mm |
| Manufacturer Part 1440-329: | Diameter 30 mm |
| Manufacturer Part 1440-012: | Diameter 12.7 mm |
|---|---|
| Manufacturer Part 1440-6168: | Diameter 450 mm |
| Grade: | 40 |
| Shape: | Circle |
| 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% |
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