selected ion monitoring

(redirected from multiple 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.
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