Substance content

{
  "id": "MLC-T-CHM-011523",
  "term": "Substance content",
  "field": "Chemistry",
  "definition": "A quantity from clinical chemistry nomenclature, obtained by dividing the moles of a component present by the total mass of the system containing it. It differs from substance concentration, which divides by volume instead of mass, so it does not change when a sample expands or contracts. Its coherent SI unit is mol/kg, often scaled to mmol/kg or umol/kg.",
  "synonyms": [
    "content"
  ],
  "subject": "Chemistry and Human Health",
  "see_also": [
    "component",
    "concentration",
    "mixture",
    "system"
  ],
  "references": [
    "PAC, 1996, 68, 957. 'Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)' on page 994 (https://doi.org/10.1351/pac199668040957)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/substance-content/"
}