Whatman™ Grade 541 Quantitative Ashless Filter Papers
Manufacturer: VWR International
Achieve ultra-fast, quantitative filtration from highly aggressive chemical solutions with Whatman™ Grade 541 Quantitative Ashless Filter Papers. This essential filter is hardened and acid-treated, giving it exceptional high wet-strength and high chemical resistance for use with strong acid and alkali suspensions. It is the definitive solution for gravimetric analysis involving difficult, gelatinous precipitates.
Description
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The filter’s core strength is its unique combination of speed and durability. It boasts a Fast Flow Rate (34 s Herzberg) and Coarse Porosity, coupled with excellent retention of 20-25 µm particles. With an extremely low ash content (0.006% maximum), it ensures accurate weight measurements after combustion. Grade 541 is a cornerstone for industrial quality control, with applications including the determination of chloride in cement, phosphorous in coal and coke, and fiber content in animal foodstuffs.
Features:
- Hardened, ashless paper with the highest purity (0.006% ash maximum) for gravimetric analysis
- High chemical resistance and high wet-strength for use with strong acid and alkali suspensions
- Coarse porosity and Fast Flow Rate (34 s Herzberg) for quick filtration
- Ideal for collecting difficult gelatinous precipitates and coarse particles (20-25 µm retention)
- Standard filter for quantitative analysis in the construction, mining, and steel industries
- Applications include determining fiber in animal foodstuffs and chloride in cement/coal
| SKU | Flow Rate | Retention | Shape | Porosity | Color |
|---|---|---|---|---|---|
| 28478-997-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-005-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-016-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-027-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-049-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-060-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-082-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-107-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-129-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-130-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-140-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-151-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-209-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28479-162-PK | Fast | 20 µm - 25 µm | Sheet | Coarse | White |
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Whatman™ Filter Paper Decision Chart | Download |
| SKU | Material | Thickness | Type | Grade | Basis Weight | Air Flow Rate |
|---|---|---|---|---|---|---|
| 28478-997-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-005-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-016-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-027-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-049-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-060-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-082-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-107-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-129-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-130-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-140-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-151-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-209-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
| 28479-162-PK | Ashless | 155 µm | Quantitative | Grade 541 | 78 g/m2 | 3 s/100 mL/in2 |
Related Products
Achieve ultra-fast, quantitative filtration from highly aggressive chemical solutions with Whatman™ Grade 541 Quantitative Ashless Filter Papers. This essential filter is hardened and acid-treated, giving it exceptional high wet-strength and high chemical resistance for use with strong acid and alkali suspensions. It is the definitive solution for gravimetric analysis involving difficult, gelatinous precipitates.
Starting at $41.24
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