Pre-extraction Filter Recovery Standard

{
  "id": "MLC-T-ENV-021919",
  "term": "Pre-extraction Filter Recovery Standard",
  "field": "Environment",
  "definition": "A group of isotopically labeled compounds added at a known amount to the filter used to indicate the extraction efficiency of the filter media. Add pre-extraction filter recovery standard to the filter samples just prior extraction. The pre-extraction filter recovery standard is not used for quantitating or recovery correction.",
  "references": [
    "40 CFR 63.11426 (2023)"
  ],
  "url": "https://mlchart.com/terminology/environment/pre-extraction-filter-recovery-standard/"
}