Elution mode

{
  "id": "MLC-T-CHM-003822",
  "term": "Elution mode",
  "field": "Chemistry",
  "definition": "The way the mobile phase is introduced into the rotating coil in high-speed counter-current chromatography, set by which liquid phase, upper or lower, is pumped in and from which end, head or tail, giving four possible combinations. Only two are recommended: the lower phase pumped from head to tail, or the upper phase pumped from tail to head. In liquid chromatography the same term also names isocratic, gradient and step elution.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "high-speed counter-current chromatography"
  ],
  "references": [
    "PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 203 (https://doi.org/10.1515/pac-2017-0111)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/elution-mode/"
}