selected ion monitoring

(redirected from single ion monitoring)

selected ion monitoring

A term defined in the context of mass spectrometry as the practice of monitoring and recording ion currents at one or more selected ion m/z values with time, rather than recording full mass spectra, as sample is introduced into the ion source. Because the detector is integrating signal for a longer time at the relevant ion, limits of detection can be lowered, at a cost of increased susceptibility of the analysis to unexpected interferences.
References in periodicals archive ?
Analysis of extracts produced using refluxing diethyl ether in a Soxhlet apparatus (100 per replicate; N=3) was conducted by single ion monitoring GC/MS (SIM GCMS, m/z = 198 e.
Selected ion data collection is even more sensitive than single ion monitoring because ion abundance is measured only for a predetermined ion rather than all ions across the whole spectrum.
Trinitrotoluene (TNT) was detected by single ion monitoring.

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