Matrix Spike and Matrix Spike Duplicate

{
  "id": "MLC-T-ENV-016689",
  "term": "Matrix Spike and Matrix Spike Duplicate",
  "field": "Environment",
  "definition": "Two aliquots of the same environmental sample to which known quantities of the target analytes are added in the laboratory. The MS and MSD are analyzed exactly like a sample, and their purpose is: to determine whether the sample matrix contributes bias to the analytical results, and to indicate precision associated with laboratory procedures. The background concentrations of the analytes in the sample matrix must be determined in a separate aliquot and the measured values in the MS and MSD corrected for background concentrations. {ORD} {OW/EAD} {OPP} {OW/TSC} {OECA} {ORCR}",
  "abbreviation": "MS and MSD",
  "subject": "Policy and guidance",
  "references": [
    "Forum on Environmental Measurements (FEM) Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/matrix-spike-and-matrix-spike-duplicate/"
}