scholarly journals The Application of Resonance-Enhanced Multiphoton Ionization Technique in Gas Chromatography Mass Spectrometry

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Adan Li ◽  
Jianzheng Song ◽  
Yang Sun ◽  
Tifeng Jiao
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Impact Ionization ◽  
Solid Phase ◽  
Multiphoton Ionization ◽  
Gas Chromatography Mass Spectrometry ◽  
Nanosecond Laser ◽  
Flight Mass Spectrometry ◽  
Polycyclic Aromatic

Gas chromatography resonance-enhanced multiphoton ionization time-of-flight mass spectrometry (GC/REMPI-TOFMS) using a nanosecond laser has been applied to analyze the 16 polycyclic aromatic hydrocarbons (PAHs). The excited-state lifetime, absorption characters, and energy of electronic states of the 16 PAHs were investigated to optimize the ionization yield. A river water sample pretreated by means of solid phase extraction was analyzed to evaluate the performance of the analytical instrument. The results suggested that REMPI is superior to electron impact ionization method for soft ionization and suppresses the background signal due to aliphatic hydrocarbons. Thus, GC/REMPI-TOFMS is a more reliable method for the determination of PAHs present in the environment.

Analysis of Polycyclic Aromatic Hydrocarbons Using Gas Chromatography-Mass Spectrometry with Multiphoton Ionization Technique

2014 ◽  
Vol 955-959 ◽  
pp. 1089-1092
Author(s):  
A Dan Li
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Polycyclic Aromatic Hydrocarbons ◽  
Aromatic Hydrocarbons ◽  
Impact Ionization ◽  
Multiphoton Ionization ◽  
Gas Chromatography Mass Spectrometry ◽  
Nanosecond Laser ◽  
Flight Mass Spectrometry ◽  
Polycyclic Aromatic

Gas chromatography resonance-enhanced multiphoton ionization time-of-flight mass spectrometry (GC/REMPI-TOFMS) using a nanosecond laser has been applied to analyze the 16 polycyclic aromatic hydrocarbons (PAHs). The excited-state lifetime, absorption characters, energy of electronic states of the 16 PAHs were investigated to optimize the ionization yield. The results suggested that REMPI is superior to elctron impact ionization method for soft ionization, and suppresses the background signal caused by the aliphatic hydrocarbons. Thus, GC/REMPI-TOFMS is a more reliable method for the determination of PAHs present in the environment.

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