Description
Quantitative filter papers Grade 391 are filtration media for quantitative and gravimetric analyses and for pressure or vacuum filtration in the laboratory. Manufactured from 100% cotton linters containing more than 98% alpha-cellulose, they are acid-washed to achieve ash-free quality and high purity. These properties support low residual ash and reliable analytical performance where clean filter blanks matter. Supplied as 1 piece from manufacturer Sartorius, Grade 391 is suited to gravimetric determinations, residue work and general quantitative filtration under ambient laboratory conditions. The cotton-linter construction gives a uniform cellulose sheet for use with pressure or vacuum setups, while acid washing and the high alpha-cellulose content deliver the purity profile expected of quantitative papers. Net weight is 0,690 kg and gross weight 1,000 kg, with country of origin Germany. Choose Grade 391 when an ash-free, high-purity quantitative filter paper is required for analytical and gravimetric procedures based on the stated material and process description.
Key features
- Pack size: 1 pc
- 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 Consommables.
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 Consommables.
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.
How does ordering and shipping work?
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.
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.