Collocated Precision

{
  "id": "MLC-T-ENV-005599",
  "term": "Collocated Precision",
  "field": "Environment",
  "definition": "precision determined from the analyzed concentrations of samples collected simultaneously from the same air mass using two discrete canisters and collected through two separate sampling devices with separate inlets. This determines the precision of the method including the sampling and analysis processes. Collocated precision is determined by calculating the absolute relative percent difference (RPD) for the collocated measurements (the absolute value of the difference between the two collocated sample results divided by their average value and expressed as a percentage).",
  "references": [
    "40 CFR Appendix A to Part 63"
  ],
  "url": "https://mlchart.com/terminology/environment/collocated-precision/"
}