ultracentrifugation isopycnic gradient ultracentrifugation CHMO:0002508 A method where the components of a sample (e.g. plasma lipoproteins) are separated on the basis of their density in a centrifuge according to the centrifugal force they experience. A density gradient is established via equilibrium sedimentation (e.g. using caesium ions), and then analyte molecules concentrate as bands where the molecule density matches that of the surrounding solution. Samples are spun at speeds of up to 150,000 rpm. 2009-10-09T11:18:05Z https://orcid.org/0000-0001-5985-7429