TY - JOUR
T1 - Volatile Organic Compound Fragmentation in the Afterglow of Pulsed Glow Discharge in Ambient Air
AU - Kravtsov, Denis
AU - Gubal, Anna
AU - Chuchina, Victoria
AU - Ivanenko, Natalya
AU - Solovyev, Nikolay
AU - Stroganov, Alexander
AU - Jin, Han
AU - Ganeev, Alexander
N1 - Publisher Copyright:
© 2022 by the authors.
PY - 2022/10
Y1 - 2022/10
N2 - Glow discharge (GD) source gained an increased level of attention in relation to the analysis of volatile organic compounds (VOCs) since past work showed that this soft ionization method allowed direct analysis of VOCs with minimal fragmentation, however, the issue of fragmentation was not previously studied in detail. The aim of the present work was to investigate the effect of discharge conditions on VOC fragmentation in the system consisting of the cell with pulsed glow discharge and a time-of-flight mass spectrometer. Ionization of VOCs of different classes (hydrocarbons, alcohols, esters, and carboxylic acids) was investigated. A copper cathode with flat geometry was used. VOCs were ionized in the afterglow of short pulse glow discharge in the air. The use of discharge afterglow significantly reduces or eliminates the effects of ionization mechanisms other than Penning process, in particular, electron ionization. This significantly reduced VOC fragmentation and provided rather low limits of detection. Specific cluster formation was observed for alcohols and esters, which may facilitate their identification.
AB - Glow discharge (GD) source gained an increased level of attention in relation to the analysis of volatile organic compounds (VOCs) since past work showed that this soft ionization method allowed direct analysis of VOCs with minimal fragmentation, however, the issue of fragmentation was not previously studied in detail. The aim of the present work was to investigate the effect of discharge conditions on VOC fragmentation in the system consisting of the cell with pulsed glow discharge and a time-of-flight mass spectrometer. Ionization of VOCs of different classes (hydrocarbons, alcohols, esters, and carboxylic acids) was investigated. A copper cathode with flat geometry was used. VOCs were ionized in the afterglow of short pulse glow discharge in the air. The use of discharge afterglow significantly reduces or eliminates the effects of ionization mechanisms other than Penning process, in particular, electron ionization. This significantly reduced VOC fragmentation and provided rather low limits of detection. Specific cluster formation was observed for alcohols and esters, which may facilitate their identification.
KW - fragmentation
KW - glow discharge
KW - mass spectrometry
KW - volatile organic compound
UR - http://www.scopus.com/inward/record.url?scp=85140738012&partnerID=8YFLogxK
U2 - 10.3390/molecules27206864
DO - 10.3390/molecules27206864
M3 - Article
C2 - 36296458
AN - SCOPUS:85140738012
SN - 1420-3049
VL - 27
JO - Molecules
JF - Molecules
IS - 20
M1 - 6864
ER -