isopycnic separation

https://doi.org/10.1351/goldbook.I03308
Chromatographic separations carried out using constant density conditions. The temperature and pressure may be altered during the run (originally the term @I03266@ was used but this term is not recommended).
Source:
PAC, 1993, 65, 2397. (Nomenclature for supercritical fluid chromatography and extraction (IUPAC Recommendations 1993)) on page 2401 [Terms] [Paper]