Collision-Induced Dissociation Study of the Adduct Ions Produced in NO3 (-)-Free Area of Atmospheric Pressure Negative Corona Discharges under Ambient Air Conditions

Kanako Sekimoto; Natsuki Matsuda; Mitsuo Takayama

doi:10.5702/massspectrometry.A0020

Collision-Induced Dissociation Study of the Adduct Ions Produced in NO3 (-)-Free Area of Atmospheric Pressure Negative Corona Discharges under Ambient Air Conditions

Mass Spectrom (Tokyo). 2013;2(1):A0020. doi: 10.5702/massspectrometry.A0020. Epub 2013 May 3.

Authors

Kanako Sekimoto¹, Natsuki Matsuda¹, Mitsuo Takayama¹

Affiliation

¹ Graduate School of Nanobioscience, Yokohama City University.

Abstract

Collision-induced dissociation (CID) experiments of adducts [M+R](-) with negative atmospheric ions R(-) (O2 (-), HCO3 (-) and COO(-)(COOH)) produced in NO3 (-)-free discharge area in atmospheric pressure corona discharge ionization (APCDI) method were performed using aliphatic and aromatic compounds M. The [M+R](-) adducts for individual R(-) fragmented to form deprotonated analytes [M-H](-) as well as the specific product ions which also occurred in the CID of [M-H](-), independent of analytes with several different functional groups. The results obtained suggested that the specific product ions formed in the CID of [M+R](-), as well as CID of [M-H](-), are generated due to further fragmentation of the product ions [M-H](-). It was concluded, therefore, that CID of [M+R](-) formed in NO3 (-)-free discharge area can indirectly lead to the formation of the product ions originating from [M-H](-).

Keywords: NO3−-free area; atmospheric ion adduct; atmospheric pressure corona discharge ionization (APCDI); collision-induced dissociation; negative atmospheric ion.