delayed extraction

(redirected from time-lag focusing)

delayed extraction

An experimental technique in time-of-flight mass spectrometry in which improved mass resolution is obtained by using a controlled delay between the initial pulse of ion formation and acceleration of the ions into the instrument’s flight tube.
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Resolution can also be improved by using ion-"trapping" methods or a time-lag focusing TOF-MS [10].
Accurate mass measurement of oligonucleotides using a time-lag focusing matrix-assisted laser desorption/ ionization time-of-flight mass spectrometer.

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