Cellulose filter papers. Filter papers from cellulose are the most used filters for all kinds of applications in laboratory, technical and industrial filtration.
What is Whatman filter paper?
Whatman filter paper is a cellulose paper made by using a high percentage of alpha-cellulose. Its contents are a sign of its consistency and high quality as alpha cellulose is considered the most stable form of cellulose. Whatman filter paper is available in a range of wet strengthened qualitative filters.
What is the pore size of Whatman filter paper 41?
20 μm
Grade 41: 20 μm (fast filter paper) The fastest ashless filter paper, recommended for analytical procedures involving coarse particles or gelatinous precipitates (e.g., iron or aluminum hydroxides).
What are the grades of filters?
Filter Guide
| Filter Grade | EU Grade | Efficiency/Arrestance |
|---|---|---|
| F8 | EU8 | 90-95% Efficiency |
| F9 | EU9 | 95% Efficiency |
| H10 | EU10 | > 95% Efficiency @ 0.3 µm |
| H13 | EU13 | > 99.997% Efficiency @ 0.3 µm |
Can tissue paper be used as filter paper?
tissue paper can be used as a filter for particulates in air, but because the material itself is so weak, a strong flow of air through it will cause it to tear to pieces.
How do I choose a filter paper?
How to select the right filter paper?
- Effective area, namely filter paper use area is big, dust capacity is big, resistance is small, service life is long, of course, the cost also increases accordingly.
- The smaller the fiber diameter, the better the interception effect and the higher the filtration efficiency.
What is the difference between Whatman filter paper 41 and 42?
Grade 41 filter paper was used for the first filtration step, and Grade 42 filter paper was used for the second filtration step (Table 1). The data show that the use of Grade 42 quantitative filter paper gave very stable results with good repeatability.
Why is ashless filter paper used?
Ashless filter papers for quantitative analyses are suitable for Buechner funnels and for filtration under pressure. The classic general purpose ashless filter paper with a medium-to-slow filtering rate. An ashless world standard filter for critical gravimetric analysis.
What grades of filter and technical papers does Sartorius offer?
Sartorius is proud to offer a full range of 100+ individual grades of filter and technical papers or boards all manufactured to our exacting standards and engineered to solve all your filtration challenges. Sartorius Ash-free Quantitative Filter Papers: The Colored Dot marks the Spot!
Are Sartorius filters ash free?
Sartorius Ash-free Quantitative Filter Papers: The Colored Dot marks the Spot! Sartorius offers a large portfolio of top quality, ash-free (ash content <0.01%), 100% cotton fiber linter filters designed especially for quantitative and gravimetric analysis.
What are green dot filter papers made out of?
These 110 mm diameter slow filtering, green dot filter papers discs are used for quantitative and gravimetric analyses as well as for pressure or vacuum filtration. They are made out of 100% cotton linters with an α-cellulose content of >98 % and are acid-washed to make the papers ashless and achieve high purity.
What are filter papers used for?
Filter Papers – An Introduction. Nowadays, high-grade filter papers are indispensible for routine work in laboratory and industrial applications. Sartorius Stedim Biotech supplies you with a broad range of filter papers for myriad filtration tasks and supports you in solving all your filtration challenges.
