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Gas-phase ion mobility studies of constitutional isomeric hydrocarbons using different ionization techniques

2001; Elsevier BV; Volume: 208; Issue: 1-3 Linguagem: Inglês

10.1016/s1387-3806(01)00384-0

1873-2798

Helko Borsdorf, Mathias Rudolph,

Advanced Chemical Sensor Technologies

We have investigated the influence of structural differences on the ionization pathways and drift behavior in ion mobility spectrometry for constitutional isomeric hydrocarbons. The ion mobility spectra of isomeric alkylated benzenes (C9H12 and C10H14) were recorded using photoionization, 63Ni ionization and corona discharge ionization. Defined spectra for almost all isomeric compounds were observed using photoionization. When using this technique, no differences in ion mobility spectra of isomers can be observed. However, the methods of atmospheric-pressure chemical ionization (63Ni and corona discharge ionization) produce differences in ion mobility spectra or in the detectable concentration ranges of isomeric compounds depending on the number and position of aliphatic side chains.