Filling solution

{
  "id": "MLC-T-CHM-004419",
  "term": "Filling solution",
  "field": "Chemistry",
  "definition": "An electrolyte solution used to fill the internal compartment of an indicator electrode or a reference electrode. This solution provides ionic conductivity and maintains a stable potential at the electrode's internal interface. For pH electrodes, the filling solution often contains a high concentration of potassium chloride.",
  "subject": "Physical and Biophysical Chemistry",
  "see_also": [
    "anion",
    "bridge solution",
    "liquid junction",
    "mobility",
    "operational pH cell",
    "reference electrode",
    "standard solution",
    "test solution"
  ],
  "references": [
    "PAC, 1985, 57, 531. 'Definition of pH scales, standard reference values, measurement of pH and related terminology (Recommendations 1984)' on page 541 (https://doi.org/10.1351/pac198557030531)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/filling-solution/"
}