| Literature DB >> 20299241 |
Min Liu1, Chengyin Wu, Zhifeng Wu, Hong Yang, Qihuang Gong, Wei Huang, Tong Zhu.
Abstract
Femtosecond (fs) lasers have high intensity and ultrashort pulse duration. Tunneling ionization occurs for molecules subject to such intense laser fields. We have studied the mass spectra of a variety of molecules irradiated by intense fs laser pulses. These molecules include some typical volatile organic compounds contained in human breath and in the atmosphere. The results demonstrate that all of these molecules can be ionized by intense fs laser pulses. Dominant parent ion and some characteristic ionic fragments are observed for each molecule. The degree of fragmentation can be controlled by adjusting the laser intensity. Moreover, saturation ionization can occur for each molecule by increasing the laser intensity. These features indicate that fs laser mass spectrometry can be a sensitive tool to identify and quantify volatile organic compounds in human breath. Copyright 2010 American Society for Mass Spectrometry. Published by Elsevier Inc. All rights reserved.Entities:
Mesh：
Substances：
Year: 2010 PMID： 20299241 DOI： 10.1016/j.jasms.2010.02.020
Source DB: PubMed Journal: J Am Soc Mass Spectrom ISSN： 1044-0305 Impact factor: 3.109