Macherey-Nagel filter paper circle MN 617, qualitative, fast (9 s), smooth (Ø 55–500 mm), 400 mm
€119.20
% Manufacturer's RRP: €149.00 20% below manufacturer's RRP
- Extremely fast throughput in just 9 s (Herzberg).
- Coarse particles: Reliable retention of 7–12 µm (ideal for gelatinous samples).
- High-purity cellulose: approx. 95 % α-cellulose content for reliable routine analyses.
- Stable structure: 85 g/m² grammage at a thickness of 0.22 mm.
- Wide range of sizes: Available in 14 diameters (Ø 55–500 mm).
- Easy to handle: Smooth surface for effortless scraping off precipitates.
Product information "Macherey-Nagel filter paper circle MN 617, qualitative, fast (9 s), smooth (Ø 55–500 mm), 400 mm"
Rapid filtration for routine qualitative analysis
In chemical, biological and industrial laboratory practice, the time-saving separation of coarse solids from liquid media is an essential process step. In contrast to quantitative analyses, where the filter paper must be ashed, qualitative filtration focuses on the rapid and efficient clarification of sample solutions. The Macherey-Nagel MN 617 filter paper circles have been developed specifically to meet these requirements. Featuring a smooth, soft surface, these cellulose filters represent the ideal laboratory standard for the rapid routine purification of biological extracts, chemical buffers or large-volume aqueous solutions. With an extremely wide range of diameters, from 55 to 500 millimetres, the system can be integrated precisely and without the need for a bypass into virtually any laboratory or industrial funnel.
Material specifications: High-purity cellulose matrix
The analytical quality of filter paper is primarily defined by its fibre structure. The MN 617 grade is manufactured from strictly selected raw materials that ensure optimum physical integrity. The paper consists of the finest cotton linters (extremely absorbent, short fibre strands from cotton seeds), combined with chemically refined pulp from coniferous and deciduous wood. This high-purity fibre blend gives a high alpha-cellulose content of approximately 95 %. Although this is a purely qualitative filter paper, for which the ash content is usually of secondary importance in terms of process technology, this value is remarkably low at approximately 0.1 %. A precisely calibrated grammage of 85 g/m² and a constant material thickness of 0.22 mm give the filter a slight wet strength, which is entirely sufficient for all standard funnel filtration processes without the need for significant additional overpressure or a strong vacuum.
Filtration kinetics: Rapid flow rate with defined particle retention
The outstanding process-related property of the MN 617 is its extremely high filtration speed. In the standardised Herzberg test, the paper achieves an excellent value of just 9 seconds (the time required for 10 ml of water to pass through unimpeded). This classification as a ‘fast’ filtering paper results from a physically open, more widely spaced fibre matrix. The filter is therefore well suited for the rapid separation of coarse, bulky or extremely flocculent particles. The retention capacity lies within the defined range of 7 to 12 micrometres (µm). Typical applications in routine laboratory work include the retention of coarse crystalline precipitates, the separation of insoluble impurities in preparation for sensitive optical analysis (such as photometry or spectroscopy), or the filtration of extremely viscous, gelatinous residues which would immediately render finer and more tightly meshed filter papers unusable due to clogging.
Technical details
- Product type: qualitative filter paper for routine analysis
- Grade: Macherey-Nagel MN 617
- Format: Filter paper circle (pre-cut for easy folding)
- Available diameters: 55, 70, 90, 110, 125, 150, 185, 240, 270, 320, 385, 400, 450, 500 mm
- Base material: High-purity cellulose blend (cotton linter and refined pulp)
- Alpha-cellulose content: approx. 95 %
- Filtration speed (classification): Fast
- Filtration time (Herzberg): 9 seconds
- Particle retention capacity: 7–12 µm
- Grammage: 85 g/m² (for a stable structure)
- Thickness: 0.22 mm
- Surface texture: Smooth and soft
- Wet strength: Low (ideal for unpressurised gravity filtration)
- Ash content: approx. 0.1 %
- Colour: White
Scope of delivery
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1 x folding box containing 100 Macherey-Nagel MN 617 filter paper circles
(Please select the variant with the diameter that fits your funnel: Ø 55 to 500 mm)
Individual requirements & accessories
Filter paper only achieves its full hydrodynamic filtration performance when used in perfect conjunction with the correct analysis funnel. Ensure that the 60° angle of the glass funnel matches the fold of your filter paper exactly to prevent air pockets. If you need to filter extremely fine precipitates (such as barium sulphate) rather than coarse particles, we strongly advise against using this fast-flowing paper and recommend switching to the MN 619 eh (slow, 140 s) or MN 619 de (very slow, 195 s) variants. Please feel free to contact our expert procurement service at any time for professional and physically accurate system advice.
| Diameter: | 400 mm |
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