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Photoionization and Dissociative Photoionization Study of Cholesterol by IR Laser Desorption/Tunable Synchrotron VUV Photoionization Mass Spectrometr |
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| Authors: | Yang Pan Li-dong Zhang Hui-jun Guo Hao Yin and Fei Qi |
| Institution: | National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China;Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics,Hefei 230026, China;National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China |
| Abstract: | Elementary cholesterol was analyzed with IR laser desorption/tunable synchrotron vacuum ultraviolet photoionization mass spectrometry. An exclusive molecular ion of cholesterol is observed by near threshold single-photon ionization with high effciency. Fragments are yielded with the increase of photon energy. The structures of various fragments are determined with commercial electron ionization time-of-flight mass spectrometry. Dominant fragmentation pathways are discussed in detail with the aid of ab initio calculations. |
| Keywords: | Cholesterol Mass spectrometry Laser desorption Photoionization Ab initio |
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