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The Consecutive Fragmentation of n-Butylbenzene in a Quadrupole Ion Trap

✍ Scribed by J. B. Plomley; F. A. Londry; R. E. March

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
436 KB
Volume
10
Category
Article
ISSN
0951-4198

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✦ Synopsis

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,H; (m/z 91) and

(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 quadruple ion trap due to an adventitious conversion of d 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.

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