Internal Standard

{
  "id": "MLC-T-ENV-014775",
  "term": "Internal Standard",
  "field": "Environment",
  "definition": "1. A pure analyte (s) or labeled compound added to a sample, extract, or standard solution in known amount(s) and used to measure the relative responses of other method analytes and surrogates that are components of the same solution. The internal standard must be an analyte that is not a desired target analyte. {OLEM/OSRTI} {ORD} {OPP} {OECA} {OW/TSC} {ORCR} OW/EAD} {OW/TSC} {OAR/OAQPS} {ORCR}\n\n2. A pure analyte (s) or labeled compound added to a sample, extract, or standard solution in known amount(s) and used to measure the relative responses of other method analytes and surrogates that are components of the same solution. The internal standard must be an analyte that is not a desired target analyte. (ORD)",
  "abbreviation": "IS",
  "subject": "Policy and guidance",
  "references": [
    "Forum on Environmental Measurements (FEM) Glossary"
  ],
  "url": "https://mlchart.com/terminology/environment/internal-standard/"
}