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Development of a New Electron Ionization/field Ionization Ion Source for Gas Chromatography/time-of-flight Mass Spectrometry by Kenji Miyamoto; Susumu Fujimaki; Yoshihisa Ueda is a Chemistry article available to read on EtoBox.

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## Abstract We have developed a combined EI/FI source for gas chromatography/orthogonal acceleration time‐of‐flight mass spectrometry (GC/oaTOFMS). In general, EI (electron ionization) and FI (field ionization) mass spectra are complementary: the EI mass spectrum contains information about fragment ions, while the FI mass spectrum contains information about molecular ions. Thus, the comparative study of EI and FI mass spectra is useful for GC/MS analyses. Unlike the conventional ion sources for FI and EI measurements, the newly developed source can be used for both measurements without breaking the ion source vacuum or changing the ion source. Therefore, the combined EI/FI source is more preferable than the conventional EI or FI ion source from the viewpoint of the reliability of measurements and facility of operation. Using the combined EI/FI source, the complementarity between EI and FI mass spectra is demonstrated experimentally with __n__‐hexadecane (100 pg): characteristic fragment ions for the __n__‐alkane such as __m/z__ 43, 57, 71, and 85 are obtained in the EI mass spectrum, while only the parent peak of __m/z__ 226 (M^+^) without any fragment ions is observed in the FI ma

Who reads Development of a New Electron Ionization/field Ionization Ion Source for Gas Chromatography/time-of-flight Mass Spectrometry?

Author

Kenji Miyamoto; Susumu Fujimaki; Yoshihisa Ueda

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0951-4198)

Published

2009

Language

EN

Field

Chemistry (Physical Sciences)