Description
Quantitative filter papers Grade 391 are laboratory filtration media intended for quantitative and gravimetric analyses as well as pressure or vacuum filtration. They are produced from 100% cotton linters with an alpha-cellulose content above 98% and are acid-washed to obtain ash-free character and high purity for residue-sensitive work. Pack size is 100 pieces, with a net weight of 2,910 kg per unit, supporting routine analytical throughput in chemistry and related laboratory settings. These Grade 391 papers from manufacturer Sartorius suit workflows that require clean filtrate handling and low background contribution during gravimetric determination. The cotton-linter base combined with acid washing underpins consistent purity for quantitative procedures where ash content must remain minimal. Non-sterile by specification, they integrate into standard filtration setups for pressure-driven or vacuum-assisted separations. Originating from Germany, they belong to a dedicated quantitative paper range used when reliable mass determination and controlled filtration behaviour are central to the method.
This article is part of Filter paper, in Filtration.
Key features
- Pack size: 100 pc(s)
- Storage temperature: Room Temperature
- Product type: Quantitative filter paper
- Grade: 391
- Material: 100% cotton linters
- Alpha-cellulose content: > 98%
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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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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.
