Description
| CROSS REFERENCE GRADES | |||||
|---|---|---|---|---|---|
| Filtration speed | CHM | WHATMAN | S&S | M&N | SARTORIUS |
| Very fast | F2045 | -- | 589/1 | 640we | 388 |
| Fast | F2041 | 41 | 589/2 | 640w | 389 |
| Medium | F2043 | 43 | 589/5 | 640m | 392 |
| Medium-slow | F2040 | 40 | 589/6 | 640md | 390 |
| Slow | F2044 | 44 | 589/3 | 640de | 391 |
| Very slow | F2042 | 42 | -- | 640d | 393 |
APPLICATION EXAMPLES
Very fast filtration:
- Determination of Ash Content: Used to quantify ash content in various samples.
- Gravimetric Analysis of Metals: Suitable for analyzing metal precipitates, such as iron, aluminum, and chromium hydroxides.
- Silicon Determination in Steel and Pig Iron: Employed in analyzing silicon content in metallurgical samples.
- Filtration of Coarse Precipitates: Ideal for separating coarse crystalline precipitates due to its wide-pore, loose structure.
Fast filtration:
- Analysis of Alkaline Earth Carbonates: Ideal for examining compounds like calcium and magnesium carbonates.
- Determining Fat Content in Natural Raw Materials: Used in assessing fat content in foodstuffs and agricultural products.
- Lead, Iron, and Silver Sulfide Analysis: Applicable in filtering coarser precipitates, including sulfides of lead, iron, and silver.
- Routine Filtration Tasks: Suitable for general laboratory filtrations requiring medium to wide-pore structures.
Medium filtration:
- Filtration of Fine Precipitates: Designed for separating fine crystalline precipitates, such as calcium oxalate and magnesium ammonium phosphate.
- Nickel and Zinc Sulfide Filtration: Effective in filtering fine precipitates like nickel and zinc sulfides.
- Gravimetric Analysis: Used in quantitative analysis where fine particle retention is crucial.
- Clarification of Solutions: Employed in clarifying liquids in various laboratory applications.
Medium-slow filtration:
- Filtration of Fine-Grained Precipitates: Suited for very fine crystalline precipitates, offering very slow filtration for precise separations.
- Barium Sulfate Precipitate Filtration: Commonly used in filtering fine barium sulfate precipitates.
- Analytical Procedures Requiring High Purity: Ideal for applications needing minimal ash content and high retention of fine particles.
- Vacuum Filtration: Suitable for vacuum or pressure filtration methods due to its wet-strengthened properties.
Slow filtration:
- Gravimetric Analyses in Power Plants: Employed in power plants for precise gravimetric determinations.
- Calcium Oxalate and Magnesium Ammonium Phosphate Filtration: Suitable for filtering fine crystalline precipitates like calcium oxalate and magnesium ammonium phosphate.
- Routine Laboratory Filtrations: Applicable in various laboratory filtrations requiring medium-fast filtering.
Very slow filtration:
- Filtration of Very Fine Precipitates: Used for separating extremely fine crystalline precipitates, providing very slow filtration for high-precision analyses.
- Barium Sulfate Precipitate Filtration: Ideal for filtering the finest forms of barium sulfate precipitates.
- Analytical Procedures Requiring Ultra-Fine Particle Retention: Suitable for analyses where capturing ultra-fine particles is essential.
- High-Purity Applications: Employed in applications demanding very low ash content and high filtration precision.
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