| Title: | Application of femtosecond laser mass spectrometry to the analysis of volatile organic compounds |
| Author(s): | Liu M; Wu C; Wu Z; Yang H; Gong Q; Huang W; Zhu T; |
| Address: | "State Key Laboratory for Mesoscopic Physics, Department of Physics, Peking University, Beijing 100871, People's Republic of China" |
| DOI: | 10.1016/j.jasms.2010.02.020 |
| ISSN/ISBN: | 1879-1123 (Electronic) 1044-0305 (Linking) |
| 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" |
| Keywords: | Air Pollutants Alcohols Alkanes Breath Tests Esters Humans Ions/chemistry Ketones Lasers Mass Spectrometry/*methods Volatile Organic Compounds/*chemistry; |
| Notes: | "MedlineLiu, Min Wu, Chengyin Wu, Zhifeng Yang, Hong Gong, Qihuang Huang, Wei Zhu, Tong eng Research Support, Non-U.S. Gov't 2010/03/20 J Am Soc Mass Spectrom. 2010 Jul; 21(7):1122-8. doi: 10.1016/j.jasms.2010.02.020. Epub 2010 Feb 18" |
