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Filter Paper Whatman
Qualitative Grades – Circles
Grade |
Flow Rate | Retention Microns | Wet Strength | Thickness mm | Ash % | |
1 | The most widely used general purpose paper | Medium/Fast | 11 | L | 0.18 | |
Slightly thicker and more retentive than No1 | Medium/Fast | 8 | L | 0.19 | 0.06 | |
3 | Double the thickness of No.1 | Medium | 6 | M | 0.39 | |
4 | Excellent retention of coarse and gelatinous precipitates | Fast | 20-25 | L | 0.21 | |
5 | Will retain fine precipitates, grained surface | Slow | 2.5 | L | 0.20 | |
6 | Faster than No.5 but almost as high retention | Slow | 3 | L | 0.18 |
Quantitative Grades – Circles
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