Absolute preconcentration

{
  "id": "MLC-T-CHM-000058",
  "term": "Absolute preconcentration",
  "field": "Chemistry",
  "definition": "A preconcentration in which the analyte is moved from a larger sample into a smaller one, so that its concentration rises without necessarily changing its ratio to the matrix. Boiling off or evaporating solvent, and extracting the analyte from water into a smaller portion of an organic solvent, are standard examples. It contrasts with relative preconcentration, which raises the analyte-to-matrix ratio.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "evaporation",
    "extraction"
  ],
  "references": [
    "PAC, 1979, 51, 1195. 'Separation and Preconcentration of Trace Substances. I-Preconcentration for Inorganic Trace Analysis' on page 1197 (https://doi.org/10.1351/pac197951051195)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/absolute-preconcentration/"
}