Centrifugation

Separating a sample by density runs on matching the spin to the particle: a cell pellet comes down at a few hundred g, a membrane fraction needs tens of thousands, and a protein in a density gradient wants a controlled profile held for hours. The work binds on three things at once, the rotor that carries the tubes, the speed the drive can reach and hold, and the temperature the chamber keeps while it runs. Across this work the Questpair catalogue holds 14850 listings from 108 verified suppliers and distributors. Separations range from a one-minute benchtop spin to a process run feeding downstream purification, and the equipment splits along those lines.