Poster Presentations
Day 2, June 11（Thu.） Room P (5F 501+502)
- 2P-10
Interpretation of α-Pinene Mass Spectra in APCI-Like Ambient Mass Spectrometry Using GC-Coupled Atmospheric Pressure Corona Discharge Ionization
(Yokohama City Univ.)
oRen Ishihara, Daisuke Fukuyama, Kanako Sekimoto
Ambient mass spectrometry (AMS) enables real-time analysis without sample preparation, yet atmospheric pressure chemical ionization (APCI)-like ion sources can oxidize analytes in-source, obscuring spectral interpretation. To separate pre-existing oxidation products from species formed inside the ion source, we investigated α-pinene, which is representative of monoterpenes that are included as fragrance ingredients, using atmospheric pressure corona discharge ionization mass spectrometry (APCDI-MS; one of APCI-like AMS) and, when needed, coupled gas chromatography (GC). By comparing adduct formation and product-ion patterns, we show that oxygenated ions from primary (pre-source) and secondary (in-source) oxidation display similar ion formation behavior. GC-based characterization of in-source oxidation provides features that assist interpretation of APCI-like AMS spectra acquired without chromatography.