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Metastable background

Term · Chemistry · MLC-T-CHM-013279

Intensity in a mass spectrum contributed by ions that fragment spontaneously between leaving the ion source and reaching the detector. Such metastable ions are recorded at apparent m/z values that match neither precursor nor product, as in the diffuse peaks at m2²/m1 seen in sector instruments, where m1 is the precursor mass and m2 the product mass.

Table 1. Record
IdentifierMLC-T-CHM-013279
FieldChemistry
SubjectAnalytical Chemistry
ReferencesPAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1841 (https://doi.org/10.1515/pac-2019-0404)
See alsoReflector voltage
Record as JSON 
{
  "id": "MLC-T-CHM-013279",
  "term": "Metastable background",
  "field": "Chemistry",
  "definition": "Intensity in a mass spectrum contributed by ions that fragment spontaneously between leaving the ion source and reaching the detector. Such metastable ions are recorded at apparent m/z values that match neither precursor nor product, as in the diffuse peaks at m2²/m1 seen in sector instruments, where m1 is the precursor mass and m2 the product mass.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "reflector voltage"
  ],
  "references": [
    "PAC, 2020, 92, 1781. 'Glossary of methods and terms used in surface chemical analysis (IUPAC Recommendations 2020)' on page 1841 (https://doi.org/10.1515/pac-2019-0404)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/metastable-background/"
}

Record 7,702 of 13,676 in Chemistry terminology (MLC-0109). Request the full dataset.