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The Consecutive Fragmentation of n ‐Butylbenzene in a Quadrupole Ion Trap
Author(s) -
Plomley J. B.,
Londry F. A.,
March R. E.
Publication year - 1996
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/(sici)1097-0231(19960131)10:2<200::aid-rcm459>3.0.co;2-0
Subject(s) - chemistry , fragmentation (computing) , quadrupole ion trap , ion trap , ion , mass spectrometry , quadrupole , analytical chemistry (journal) , thermometer , atomic physics , chromatography , organic chemistry , physics , computer science , operating system , quantum mechanics
The molecular ion of n ‐butylbenzene ( m/z 134) is one of the most widely used thermometer molecules in mass spectrometry, the ratio of abundances of its competitive two‐channel decomposition products, C 7 H + 7( m/z 91) and C 7 H + · 8( m/z 92), serving as a measure of the average internal energy deposited into the parent ion. We have demonstrated, using a waveform generator, that the m/z 91/92 ratio is enhanced in a quadrupole ion trap due to an adventitious conversion of m/z 92 to m/z 91 during the period of resonant excitation. Such a convolution of the m/z 91/92 ratio can result in an error as high as 0.6 eV when gauging the average internal energy of the parent ion.