What question did this study set out to answer?

To investigate the ionization mechanisms of n-heptane in corona discharge conditions.

April 20, 2026Open Access

Atmospheric Pressure Corona Discharge Ionization of n-Heptane (I). Formation of Molecular Ion M+•, and Dehydrogenated Ions M−2H+• and M−nH+ (n=1, 3, 5)

Key Points

To investigate the ionization mechanisms of n-heptane in corona discharge conditions.
Utilized atmospheric pressure corona discharge (APCD) for ion generation from n-heptane.
Analyzed the formation of molecular ions M+ and [M-nH]+ using mass spectrometry.
Identified ion formation pathways through interactions with air components.
M+ and [M-2H]+ ions were successfully detected in the ionization process.
Ion formation mechanisms include high-electric field tunnel ionization and collisional interactions.
Dehydrogenated ions [M-nH]+ were produced, showing potential pathways for alkyl fragment formation.

Abstract

The formation of M + , M-2H + , and M-nH + (n=1, 3, 5) ions has been reported by using atmospheric pressure corona discharge (APCD) of n-heptane.The M + and M-H + ions can be produced by high-electric field tunnel ionization (HEFTI) and hydride abstraction reactions, respectively.It has been proposed that the M-2H + , Mass Spectrometry Advance Publication result of collisional interactions between the M + ion and the air components such as N2, O2, and Ar, or to the result of the HEF-induced cracking reaction leading to the alkyl fragments.

Bookmark

View Full Paper

Bookmark

View Full Paper

Atmospheric Pressure Corona Discharge Ionization of n-Heptane (I). Formation of Molecular Ion M+•, and Dehydrogenated Ions M−2H+• and M−nH+ (n=1, 3, 5)

Key Points

Abstract

Cite This Study