Effect of Ammonia Addition to the Mobile Phase on Atmospheric Pressure Chemical Ionization Mass Spectrometry of Methyl Hydroperoxyoleates.
Year: 1998
Type: article
Abstract: The method for observing molecular related ions of methyl hydroperoxyoleates (OMH) by atmospheric pressure chemical ionization (APCI) mass spectrometry (MS) was investigated. Since thermally labile OMH is decomposed in the APCI nebulizer and/or desolvation chamber heated to a high temperature, it is difficult to observe significant peaks of their protonated molecules. The addition of ammonia water to the mobile phase (ethanol) was quite effective to suppress the thermal decomposition of OMH. As the result the mass spectra exhibited the intense peaks of ammonium adduct ions of OMH, [M+NH4]+, at m/z 346. The nebulizer temperature at 170°C and the drift voltage at 170 V were adequate for observing the molecular ion species of OMH.
Authors: Yoshiyuki MOCHIDA, Yukio YOKOYAMA, Shigeo NAKAMURA
Institutions: Kanagawa University, Yokohama National University
Language: English
Subfield: Spectroscopy
Field: Chemistry
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1979868604