Laboratory Method Blank

{
  "id": "MLC-T-ENV-015237",
  "term": "Laboratory Method Blank",
  "field": "Environment",
  "definition": "A quality control sample to assess background contamination or interference from media, reagents, equipment, etc. An LMB is prepared in the laboratory, composed of clean sampling media (filter and XAD-2), using same labeled standards, media, reagents, and materials (sodium sulfate, glass wool, etc.) and processed (extraction, fractionations, cleanup) and analyzed using the same procedures as a field sample.",
  "references": [
    "40 CFR 63.11426 (2023)"
  ],
  "url": "https://mlchart.com/terminology/environment/laboratory-method-blank/"
}