Run bias

{
  "id": "MLC-T-CHM-010454",
  "term": "Run bias",
  "field": "Chemistry",
  "definition": "A systematic error that affects all measurements performed within a single analytical run, causing them to deviate consistently from the true value. This bias can arise from factors such as instrument drift, reagent batch variations, or environmental changes during the run. It is distinct from overall laboratory bias, which affects results across multiple runs.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "analytical chemistry",
    "analytical run",
    "laboratory bias",
    "measurement procedure bias",
    "systematic effect"
  ],
  "references": [
    "PAC, 2021, 93, 997. 'Metrological and quality concepts in analytical chemistry (IUPAC Recommendations 2021)' on page 1015 (https://doi.org/10.1515/pac-2019-0819)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/run-bias/"
}