Imaging Science and Photochemistry ›› 1995, Vol. 13 ›› Issue (2): 117-121.DOI: 10.7517/j.issn.1674-0475.1995.02.117

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UV LASER DESORPTION/IONIZATION TIME-OF-FLIGHT MASS SPECTROMETRY OF AROMATIC MOLECULES

WANGXUE-FENG1, WANG ZHI-LIN1, QIN QI-ZONG1, LI HAI-YANG2, MA CHEN-SHENG2, BAI JI-IING2   

  1. 1. Laser Chemistry Institute, Fudan University, Shanghai 200433, P. R. China;
    2. Dalian Institute of Chemical Physics, Dalian 116023, P. R. China
  • Received:1994-07-15 Revised:1994-10-19 Online:1995-05-20 Published:1995-05-20

Abstract: Time-of-flight mass spectrometry of several aromatic molecules were investigated in onestep UV laser desorption/ionization. Results show that benzo[e]pyrene is softly-ionized byresonant two-photo ionization, and that fluoranthene is ionized via three-photo ionization.2,5-dihydrobenzic acid and cinnamic acid can also be ionized by pulsed UV laser and molecule-ion reactions occured during desorption and ionization processes.

Key words: aromatic hydrocarbons, UV laser ionization, time-of-flight mass spectrometry