Phase ratio

{
  "id": "MLC-T-CHM-008746",
  "term": "Phase ratio",
  "field": "Chemistry",
  "definition": "The volume of mobile phase in a chromatographic column divided by the volume of stationary phase, symbol β, a dimensionless number. Because the retention factor equals the distribution constant divided by β, a smaller β gives stronger retention of an analyte with a given distribution constant. In capillary gas chromatography it is roughly the column radius divided by twice the film thickness.",
  "subject": "Analytical Chemistry",
  "references": [
    "Orange Book, 2nd ed., p. 100 (https://media.iupac.org/publications/analytical_compendium/)",
    "PAC, 1993, 65, 819. 'Nomenclature for chromatography (IUPAC Recommendations 1993)' on page 833 (https://doi.org/10.1351/pac199365040819)",
    "PAC, 1993, 65, 2373. 'Nomenclature for liquid-liquid distribution (solvent extraction) (IUPAC Recommendations 1993)' on page 2385 (https://doi.org/10.1351/pac199365112373)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/phase-ratio/"
}