Whatman™ Grade 40 Quantitative Ashless Filter Papers
Manufacturer: VWR International
Description
The filter is engineered for versatile quantitative separations, offering a reliable balance of Medium Porosity and Medium Flow Rate. With 8 µm particle retention, it is effective for collecting medium-sized precipitates. Grade 40 is widely used across multiple sectors: it is a primary filter in soil analysis, a crucial tool for the quantitative determination of milk sediment, and an excellent clean-up filter for solutions prior to AA spectrophotometry. Its high purity and consistent performance make it an indispensable reagent for reliable analytical results.
Features:
- Ashless filter paper with 0.007% maximum ash content, ideal for gravimetric analysis
- Medium flow rate and medium particle retention (8 µm) for general quantitative separations
- Used in the quantitative determination of sediments in milk
- Serves as a clean-up filter for solutions prior to AA spectrophotometry
- Standard for analysis of components in cements, clays, iron, and steel products
- High-purity filter paper for accurate analysis
| SKU | Flow Rate | Retention | Shape | Porosity | Color |
|---|---|---|---|---|---|
| 28475-004 | Medium | 8 µm | Circle | Medium | White |
| 28475-015 | Medium | 8 µm | Circle | Medium | White |
| 28475-026 | Medium | 8 µm | Circle | Medium | White |
| 28475-060 | Medium | 8 µm | Circle | Medium | White |
| 28475-081 | Medium | 8 µm | Circle | Medium | White |
| 28475-106 | Medium | 8 µm | Circle | Medium | White |
| 28475-128 | Medium | 8 µm | Circle | Medium | White |
| 28475-140 | Medium | 8 µm | Circle | Medium | White |
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Whatman™ Filter Paper Decision Chart | Download |
| SKU | Material | Thickness | Type | Grade | Basis Weight | Air Flow Rate |
|---|---|---|---|---|---|---|
| 28475-004 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-015 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-026 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-060 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-081 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-106 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-128 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
| 28475-140 | Ashless | 210 µm | Quantitative | Grade 40 | 95 g/m2 | 21 s/100 mL/in2 |
Starting at $48.47
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