Filter paper

Choose qualitative when the title says qualitative, for general filtration. Choose quantitative when the title says quantitative, for work where the paper itself is part of the measurement, such as a gravimetric determination. Do not swap them in that determination. The diameter is in the title. Membranes are in membrane filters, and small samples go through syringe filters.

Match the diameter in the title to the funnel. A round filter that is too wide will not sit flat. A filter that is too small lets liquid pass around it. The title also states the speed or the grade when the paper has one. Questions: sales@luminixhealth.com.

Coarse and gelatinous precipitates filter best on fast paper, which does not clog. Fine crystalline precipitates, such as barium sulphate, need slow, dense paper so the particles do not pass. Medium paper is a sound general choice for routine filtration. Check the particle retention on the product page. Faster paper saves time but retains fewer fine particles. Matching funnels are in Buchner and filter funnels. Need advice for your set-up? Mail sales@luminixhealth.com.

Ashless paper burns away with almost no residue. That matters in gravimetric analysis, where the filter paper and the precipitate are ignited together in a crucible and only the precipitate should be weighed. For ordinary clarification of a solution, low ash content is not needed. Ashless paper is also known as quantitative paper. Ordinary qualitative paper costs less and filters just as well for routine work. See crucibles and muffle and tube furnaces. For a quote or a second opinion, write to sales@luminixhealth.com.

Cellulose filter paper retains particles throughout its depth, which suits clarifying solutions, collecting precipitates and gravimetry. A membrane filter has a defined pore size, which you need for sterile filtration, particle analysis or sample preparation before HPLC. Check the pore size on the product page and compare it with your application. Membrane filters are also available as ready-to-use syringe filters. See membrane filters and syringe filters. Questions about a specific product? Contact sales@luminixhealth.com.

Hardened paper tears less under vacuum or pressure and releases fewer fibres into the filtrate. That makes it the right choice for filtration on a Buchner funnel and when you want to scrape a precipitate off the paper. For gravity filtration in a conical funnel, ordinary paper is usually enough. Choose the diameter to suit your funnel. Funnels for vacuum work are in Buchner and filter funnels. Unsure which one fits? Ask sales@luminixhealth.com.

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.

This shelf belongs to Filtration, inside Lab consumables. Luminix Health distributes this range for laboratory use.

The neighbouring shelves 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. The category above this shelf is Filtration.

Luminix Health distributes this range from the heart of Europe. We deliver across the EU in two to five days if in stock. 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. Send a quote request, contact the team, or read who we are. The full brand index is on shop by brand.

The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology. If the article is not on the shelf, request a quote.