Spike

{
  "id": "MLC-T-ENV-026372",
  "term": "Spike",
  "field": "Environment",
  "definition": "1. A substance that is added to an environmental sample to increase the concentration of target analyte by known amount; used to assess measurement accuracy (spike recovery). Spike duplicates are used to assess measurement precision.\n\n2. To add a known concentration or amount of analyte to a sample for the purpose of determining recovery.\n\n3. A known quantity of an analyte added to a sample for the purpose of determining recovery or efficiency (analyst spikes), or for quality control (blind spikes). {OW/EAD} {OPP} {OAR/OAQPS} {ORCR}\n\n4. A known quantity of an analyte added to a sample for the purpose of determining recovery or efficiency. {ORD} {OECA}\n\n5. A known quantity of an analyte added to a sample for the purpose of determining recovery or efficiency. (ORD)\n\n6. A known quantity of an analyte added to a sample for the purpose of determining recovery or efficiency (analyst spikes), or for quality control (blind spikes).",
  "subject": "Policy and guidance",
  "references": [
    "Guidance for Quality Assurance Project Plans",
    "Great Lakes: Quality Management Training - Data Review Glossary; Great Lakes: Quality Management Training - Quality Glossary",
    "Forum on Environmental Measurements (FEM) Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/spike/"
}