Abstract
Reduction of the oligomers formed from on-line electropolymerization of aniline, the compound N-phenyl-1,4-phenylenediimine, and the thiazine dye thionin was observed in both an atmospheric pressure chemical ionization and an atmospheric pressure photoionization source. The reduction, which alters the mass of these analytes by 2 Da, was shown to occur by means of a surface-assisted process which involves reactive species, possibly hydrogen radicals, generated from protic solvents in the ionization plasma. Reduction was minimized by limiting protic solvents, by using a high heated nebulizer temperature, and by using a clean, heated nebulizer probe liner. The expected generality of this reduction process, and the possibility of similar reduction processes in other plasma ionization sources are discussed in relation to the use of these ion sources for on-line electrochemistry/mass spectrometry experiments.
| Original language | English |
|---|---|
| Pages (from-to) | 109-117 |
| Number of pages | 9 |
| Journal | Journal of the American Society for Mass Spectrometry |
| Volume | 13 |
| Issue number | 2 |
| DOIs | |
| State | Published - 2002 |
Funding
VK acknowledges support through an appointment to the Oak Ridge National Laboratory (ORNL) Postdoctoral Research Associates Program administered jointly by the Oak Ridge Institute for Science and Education and ORNL. APCI-, APPI-, and ES-MS instrumentation was provided through a Cooperative Research and Development Agreement with SCIEX (CRADA No. ORNL96-0458). This work was supported by the Division of Chemical Sciences, Geosciences, and Biosciences, Office of Basic Energy Sciences, United States Department of Energy under Contract DE-AC05-00OR22725 with ORNL, managed and operated by UT-Battelle, LLC.