摘要
利用一步紫外激光脱附和电离的飞行时间质谱法，测定了几种芳香烃分子：苯并［ｅ］芘、荧蒽、肉桂酸和２，５－二羟基苯甲酸的质谱。实验结果发现，苯并［ｅ］芘发生有效的“软”电离，属于双光子电离过程。而荧蒽需吸收三个光子才能电离。对２，５－二羟基苯甲酸和肉桂酸，在紫外脉冲激发作用下除了自身电离外，还发生了分子离子反应。
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.
出处
《感光科学与光化学》
CSCD
1995年第2期117-121,共5页
Photographic Science and Photochemistry
基金
国家自然科学基金
关键词
芳香烃
激光电离
大气污染
大气监测
质谱分析
aromatic hydrocarbons,UV laser ionization,time-of-flight mass spectrometry To whom correspondence should be addressed.
