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Whatman™ Grade 40 Quantitative Filter Papers, Ashless, Circles (100/PK)
Suitable for a variety of analytical filtration applications
As low as $37.35
| Part Number | 1440-Dxx-Series |
|---|---|
| Cross Reference(s) | - - - |
Product Overview
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.
- 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
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 cements, clays, iron, and steel products
- Collection of trace elements and radionuclides from the atmosphere
Additional Information
| Part Number | 1440-Dxx-Series |
|---|---|
| Cross Reference(s) | - - - |
| Pack Size: | 100 pcs |
| Filter Paper Grade | Grade 40 |
| Format | Circles |
| Type | Ashless |
| Typical Particle Retention in Liquid | 8 µm |
| Nominal thickness | 210 µm |
| Typical water flow rate at 45 psi (3.1 bar) | 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% |
| 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. |