Description
Quantitative filter papers Grade 391 are laboratory media designed for quantitative and gravimetric analyses as well as pressure or vacuum filtration. They are made from 100% cotton linters with an alpha-cellulose content above 98% and are acid-washed to secure ash-free quality and high purity. This composition and treatment support consistent blanks and dependable results in analytical sample work-up. Available in packs of 100 pieces from manufacturer Sartorius, the papers fit gravimetric assays, residue collection and related quantitative filtration steps in research and QC environments. The cotton-linter base forms a stable cellulose matrix suitable for pressure- or vacuum-assisted filtration, while acid washing and the elevated alpha-cellulose level underpin the ash-free character needed for quantitative methods. Net weight is 2,600 kg and gross weight 2,700 kg per pack, originating from Germany. Grade 391 quantitative papers provide a clear option for laboratories seeking ash-free, high-purity filter media strictly according to the stated cotton-linter composition and intended analytical uses.
This article is part of Filter paper, in Filtration.
Key features
- Pack size: 100 pc(s)
- Storage temperature: Room Temperature
- Grade: 391
- Material: 100% cotton linters
- Alpha-cellulose content: > 98%
- Treatment: Acid-washed, ash-free
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Questions about Quantitative Papers/ Grade 391
What is this article?
Quantitative Papers/ Grade 391 is the article on this page. Luminix Health distributes Sartorius 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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We deliver across the EU, usually within two to five working days. More is on Delivery across the EU. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
