Whatman™ Grade 44 Quantitative Ashless Filter Papers
Manufacturer: VWR International
Achieve unparalleled precision and efficiency in your gravimetric analyses with Whatman™ Grade 44 Quantitative Ashless Filter Papers. This fine retention filter is a thin version of Grade 42, engineered specifically to provide a lower ash weight per sample and a significantly faster filtration speed. It is the ideal solution for analyses relying on accurate ash-free dry mass measurements where minimizing filtration time is critical.
Description
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The filter’s core benefit is its optimized balance of thickness and speed. Its reduced thickness results in a very low overall ash content, and its Fine Porosity provides a stringent 3 µm nominal particle retention. With almost twice the flow rate of thicker filters with similar retention (Herzberg 995 s), Grade 44 streamlines the time-consuming process of separating fine precipitates. This quantitative, ashless paper ensures the highest accuracy and efficiency in your lab.
Features:
- Ashless paper designed for critical gravimetric analysis and accurate ash-free dry mass measurements
- Thinner paper than Grade 42, resulting in a lower ash weight per sample
- Significantly faster flow rate (almost twice Grade 42's flow rate)
- Very fine nominal particle retention rating of 3 µm (Fine Porosity)
- Ideal for faster filtration of fine particles where speed is a priority
- Typical thickness of 176 µm
| SKU | Flow Rate | Retention | Shape | Porosity | Color |
|---|---|---|---|---|---|
| 28482-043-PK | Slow | 3 µm | Circle | Fine | White |
| 28482-065-PK | Slow | 3 µm | Circle | Fine | White |
| 28482-070-PK | Slow | 3 µm | Circle | Fine | White |
| 28297-334-PK | Slow | 3 µm | Circle | Fine | White |
|
Whatman™ Filter Paper Decision Chart | Download |
| SKU | Material | Thickness | Type | Grade | Basis Weight | Air Flow Rate |
|---|---|---|---|---|---|---|
| 28482-043-PK | Ashless | 176 µm | Quantitative | Grade 44 | 80 g/m2 | 56 s/100 mL/in2 |
| 28482-065-PK | Ashless | 176 µm | Quantitative | Grade 44 | 80 g/m2 | 56 s/100 mL/in2 |
| 28482-070-PK | Ashless | 176 µm | Quantitative | Grade 44 | 80 g/m2 | 56 s/100 mL/in2 |
| 28297-334-PK | Ashless | 176 µm | Quantitative | Grade 44 | 80 g/m2 | 56 s/100 mL/in2 |
Related Products
Achieve unparalleled precision and efficiency in your gravimetric analyses with Whatman™ Grade 44 Quantitative Ashless Filter Papers. This fine retention filter is a thin version of Grade 42, engineered specifically to provide a lower ash weight per sample and a significantly faster filtration speed. It is the ideal solution for analyses relying on accurate ash-free dry mass measurements where minimizing filtration time is critical.
Starting at $95.21
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