Surface amount

{
  "id": "MLC-T-CHM-011627",
  "term": "Surface amount",
  "field": "Chemistry",
  "definition": "The excess amount of a substance accumulated at an interface between two bulk phases, compared to the amount that would be present if the bulk concentrations were maintained up to a hypothetical dividing surface. This quantity, also known as surface excess, is a key concept in the Gibbs model of interfaces. It is expressed in units of amount of substance, such as moles.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "amount of substance"
  ],
  "references": [
    "Green Book, 2nd ed., p. 63 (https://goldbook.iupac.org/files/pdf/green_book_2ed.pdf)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/surface-amount/"
}