Dialysis tubing & devices

The molecular weight cut-off (MWCO) should be clearly lower than the molecular weight of the molecule you want to keep; a common rule of thumb is about half or less. Small molecules, such as salts and buffer components, pass through the membrane, while your protein stays inside. Check the MWCO on the product page. To concentrate rather than exchange buffer, see ultrafiltration and concentrators. Unsure which one fits? Ask sales@luminixhealth.com.

Tubing comes on a roll: you cut it to length and close it with clips. It is economical and flexible in volume, which suits larger or varying samples. Ready-made dialysers or strips need no clips, handle small volumes with less sample loss and are quick to fill. If you work with tubing, blunt tweezers and forceps help to handle the wet membrane. Both formats are in dialysis tubing and devices. Need advice for your set-up? Mail sales@luminixhealth.com.

The flat width of the tubing sets its diameter and therefore the volume it holds per centimetre. Choose a width that fits your sample volume in a manageable length, and leave room inside, because the tubing swells as water flows in by osmosis. Check the volume per centimetre on the product page to calculate the length to cut. Compare widths in dialysis tubing and devices. For a quote or a second opinion, write to sales@luminixhealth.com.

Use plastic clips that are longer than the flat width of the tubing, so the whole end is sealed. Weighted clips keep the tubing under water, while floating clips keep it upright at the surface of the buffer. Universal closures can be reopened and used again, which suits repeated runs. Check the clip length on the product page against your tubing width. Clips and tubing are both in dialysis tubing and devices. Questions about a specific product? Contact sales@luminixhealth.com.

Dialysis tubing is a membrane tube that lets small molecules leave a sample and keeps macromolecules inside, until both sides approach equilibrium. The molecular-weight cutoff and the flat width are the specification. It is a slow method. The tubing has to be wetted and rinsed as the pack says.

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 Filter paper, 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 and Extraction thimbles. 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.