Quality Control Sample (quality)

{
  "id": "MLC-T-ENV-022896",
  "term": "Quality Control Sample (quality)",
  "field": "Environment",
  "definition": "1. An uncontaminated sample matrix spiked with known amounts of analytes from a source independent from the calibration standards. It is generally used to establish intra-laboratory or analyst specific precision and bias or to assess the performance of all or a portion of the measurement system. This does not include matrix spikes or laboratory duplicates, which are also QC samples. {OW/EAD}\n\n2. A solution of method analytes of known concentrations that is used to fortify an aliquot of Laboratory Reagent Blank (LRB) or sample matrix. The QCS is obtained from a source external to the laboratory is different from the source of calibration standards. It is used to check laboratory performance with externally prepared test materials. This is a Performance Evaluation Sample in other arenas. {ORD}",
  "abbreviation": "QCS",
  "subject": "Policy and guidance",
  "references": [
    "Forum on Environmental Measurements (FEM) Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/quality-control-sample-quality/"
}