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Whatman 无灰级定量滤纸 Grade 41
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品牌 : Whatman
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产品分类：滤纸
GE’s Whatman Grade 41 environmental pollution papers are among the fastest filter papers in the Whatman ashless range. This gravimetric filter is well suited for quantitative analysis of soil and air.
Extremely low ash content (0.007% ash maximum)
20 µm nominal particle retention rating
Fast filtration speed (Herzberg 54 s)
Commonly used for routine air pollution analysis and soil pollution analysis
Aside from Grade 41 environmental pollution papers, Whatman quantitative paper comes in a variety of particle retentions, filtration speeds, and filter thicknesses to provide you with the appropriate filter for your precipitate. Also see our hardened ashless grades for analysis requiring the use of strong acids or bases.
Fast ashless paper for pollution analysis
Whatman Grade 41 filters from GE Healthcare’s Life Sciences business are suitable for quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates.
Grade 41 filters are also commonly used in preparing solid environmental samples (e.g., soils, sludges) for metals analysis after nitric acid digestion. Grade 41 is available in a convenient, disposable, 47 mm filter funnel with a 250 ml capacity. The 47 mm diameter filter can be easily removed for further analysis or culturing.
Looking for a filter paper, membrane filter, or syringe filter? Let GE help you find the optimal filter for your needs to ensure reliable analysis.
PRODUCT SPECIFICATIONS
| Parameter | Grade 41 Fast Ashless Filter Paper |
|---|---|
| Grade | Grade 41 |
| Format | Circles / Sheet |
| Type | Ashless |
| Typical Particle Retention in Liquid 1 | 20µm |
| Nominal thickness | 215 µm |
| Typical water flow rate 2 | 254 ml/min |
| Nominal basis weight | 85 g/m² |
| Nominal air flow rate | 4 s/100 mL/in² |
| Nominal Ash Content 3 | 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. For analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides). Also used in quantitative air pollution analysis as a paper tape for impregnation when determining gaseous compounds at high flow rates. |
| Dimensions Ø ( mm ) | 25 / 32 / 42.5 / 47 / 50 / 55 / 60 / 70 / 90 / 110 / 125 / 150 / 185 / 240 / 320 / 203*254 / 460*570 |
2：For 9 cm diameter
3：Ash is determined by ignition of the cellulose filter at 900°C in air.
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