Description
Round filter Munktell grade 292, 70 mm Ø is a qualitative-technical filter paper disc for normal laboratory filtration of medium-fine crystalline precipitates. The smooth surface and wet-strength construction support reliable handling when wet, while the low ash content of approximately 0,1 % suits routine qualitative and technical work. Typical pore size is 5–8 µm, with a basis weight of 87 g/m².
This article is part of Filter paper, in Filtration.
Filtration performance is characterised by a filtration speed of 50 s/10 ml and a Herzberg filtration time of 500 s/100 ml, corresponding to about 120 ml/min. Each pack contains 100 filters, ready for general precipitate separation, clarifying steps, and everyday sample work-up. These round filters from manufacturer Marienfeld are intended for standard qualitative-technical filtration rather than ultra-trace ash-critical applications. The 70 mm diameter fits common funnels and holders used in teaching, QC, and research laboratories needing consistent medium-fine retention with wet strength and a smooth working surface.
Key features
- Pack size: 100 filters per box
- Diameter: 70 mm
- Grade: Munktell 292
- Typical pore size: 5–8 µm
- Basis weight: 87 g/m²
- EAN: 4250317358356
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Questions about Filter paper circles Munktell grade 292, 70 mm Ø
What is this article?
Filter paper circles Munktell grade 292, 70 mm Ø is the article on this page. Luminix Health distributes Marienfeld for laboratory use. It sits in Filter paper, inside Filtration, in Lab consumables.
Filter paper is a cellulose sheet of a stated retention and speed. Qualitative paper clarifies. Quantitative, ashless paper is for a precipitate that will be weighed or ashed, because the paper itself leaves almost no ash. The diameter has to match the funnel.
Filtration holds back what is larger than the pores and lets the rest through. Paper is the ordinary laboratory filter. A membrane has a stated pore size and a polymer that must survive the solvent. A syringe filter is that membrane in a housing on a syringe. Glass fibre takes a higher dirt load. Ultrafiltration holds back macromolecules and passes salts. The pore size, the chemical compatibility and the volume are the three choices. Laboratory apparatus around filtration is indexed under ISO laboratory apparatus.
Which category should I open next?
The category is Filtration. The sub-category is Filter paper. The catalogue is Lab consumables.
Shelves beside this one are Sintered glass filter plates & discs, Syringe filters, Filter cartridges & capsules, Membrane filters, Glass & quartz fibre filters, Bottle-top & vacuum filtration units, Ultrafiltration & concentrators, Filtration accessories, Extraction thimbles and Dialysis tubing & devices.
What should I check before I order?
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.