metastable ion


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metastable ion

A precursor ion that dissociates into a fragment ion and neutral species after acceleration, but before reaching the detector. It is best observed when it occurs in a field-free region of a sector mass spectrometer.
References in periodicals archive ?
As with metastable ions in a fragmentation process where [M.sup.+] [right arrow] [A.sup.+], [M.sup.+] and [A.sup.+] may be referred to as parent and daughter ions respectively.