External standard

{
  "id": "MLC-T-CHM-004272",
  "term": "External standard",
  "field": "Chemistry",
  "definition": "A reference substance of known concentration that is analyzed separately from the sample to create a calibration curve. This curve relates the instrument response to the analyte concentration. The concentration of an unknown sample is then determined by comparing its instrument response to this calibration curve.",
  "subject": "Analytical Chemistry",
  "references": [
    "PAC, 1993, 65, 819. 'Nomenclature for chromatography (IUPAC Recommendations 1993)' on page 837 (https://doi.org/10.1351/pac199365040819)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/external-standard/"
}