Delayed extraction

{
  "id": "MLC-T-CHM-013023",
  "term": "Delayed extraction",
  "field": "Chemistry",
  "definition": "A method in time-of-flight mass spectrometry where ions are allowed to drift for a short period in a weak electric field before being accelerated by a strong electric field into the flight tube. This delay in acceleration compensates for the initial kinetic energy spread of the ions, improving mass resolution. It is also known as time-lag focusing.",
  "subject": "Analytical Chemistry",
  "see_also": [
    "accelerating potential",
    "desorption ionization",
    "time-lag focusing"
  ],
  "references": [
    "PAC, 2013, 85, 1515. 'Definitions of terms relating to mass spectrometry (IUPAC Recommendations 2013)' on page 1535 (https://doi.org/10.1351/PAC-REC-06-04-06)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/delayed-extraction/"
}