Whatman™ Grade 4 Qualitative Cellulose Filter Papers
Manufacturer: VWR International
Description
The filter’s core strength is its capacity to handle large, difficult precipitates. It provides excellent retention for gelatinous precipitates such as aluminum hydroxide and ferric hydroxide. Its speed and 20-25 µm particle retention make it highly valuable for the routine cleanup of biological fluids and organic extracts during analysis. It is also specified for use in air pollution monitoring where a high flow rate is required to collect atmospheric dust. For maximum efficiency, the Grade 4 paper is also available in prepleated formats for even faster flow and increased loading capacity.
Features:
- Extremely high flow rate and coarse porosity for rapid filtration
- Excellent retention of coarse particles and gelatinous precipitates (20-25 µm)
- Ideal for routine cleanup of biological fluids or organic extracts
- Used for air pollution monitoring where high flow rates are required
- Available in a wide range of sizes and formats, including prepleated filters for maximum efficiency
| SKU | Flow Rate | Retention | Shape | Porosity | Color |
|---|---|---|---|---|---|
| 28460-019-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-030-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-041-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-063-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-085-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-110-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-120-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-142-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-164-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
| 28460-171-PK | Fast | 20 µm - 25 µm | Circle | Coarse | White |
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Whatman™ Filter Paper Decision Chart | Download |
| SKU | Material | Thickness | Type | Grade | Basis Weight | Air Flow Rate |
|---|---|---|---|---|---|---|
| 28460-019-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-030-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-041-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-063-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-085-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-110-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-120-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-142-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-164-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
| 28460-171-PK | Cellulose | 210 µm | Qualitative | Grade 4 | 92 g/m2 | 4 s/100 mL/in2 |
Starting at $17.24
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