摘要
为揭示多氯代多环芳香化合物的质谱裂解规律,对10种标准多氯代多环芳香化合物(PCAHs)进行电子轰击质谱(EI-MS)和大气压化学电离质谱(APCI-MS)分析。发现在EI-MS中,所有C—Cl键均易断裂,得到失去一个或多个氯原子的碎片峰,这些碎片峰呈现偶强(失去偶数个氯原子)奇弱(失去奇数个氯原子)的分布规律,而且大多数PCAHs的分子离子峰为基峰。在APCI-MS中,完全由六元芳香环构成的全氯代芳香烃不出现分子离子峰,而其他的PCAHs则均出现分子离子峰和加合峰。
10 polychlorinated polycyclic aromatic hydrocarbons (PCAHs) were analyzed by e- lectron bombard ionization mass spectrometry (EI-MS) and MS equipped with atmospheric pressure chemical ionization source (APCI-MS). In the EI-MS mode, the C--Cl bonds in all the PCAHs are liable to break, and the abundance of the peaks which lose even Cl atoms are stronger than that of peaks which lose odd Cl nated aromatic hydrocarbons which consist of onic peaks, while the other PCAHs give both atoms. In the APCI-MS mode, the perchlori- six-member rings do not produce molecular imolecular ionic peaks and adduct ionic peaks.
出处
《质谱学报》
EI
CAS
CSCD
2009年第1期12-17,共6页
Journal of Chinese Mass Spectrometry Society
基金
国家自然科学基金(20671002)
安徽师范大学校基金资助