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Ryuichi Kikkawa, Yoshiya Inokuchi, Takayuki Ebata, Hiroyuki Saigusa MASS SPECTROMETRY FOR NONVOLATILE FUNCTIONAL MOLECULES BY LASER DESORPTION/VACUUM-ULTRAVIOLET PHOTOIONIZATION METHODLaser desorption (LD)/vacuum ultraviolet (VUV) photoionization (PI) mass spectrometry (LD/VUVPI MS) is presented for nonvolatile bio-related aromatic molecules (tyramine, L-phenylalanine and L-tyrosine) and functional molecules (dibenzo-18-crwon-6-ether, calix[4]arene, calix[8]arene and calix[4]resorcinarene). A pellet of the sample mixed with graphite matrix was irradiated by IR laser for the desorption and the vaporized sample was ionized by a vacuum ultraviolet light at 10.5 eV, which was obtained by the high harmonic generation of Nd:YAG laser light. The ionized sample was mass analyzed by a time-of-flight mass spectrometer. LD/VUVPI mass spectrometry has been successfully carried out for the molecules examined. It was found that the bio-related aromatic molecules exhibit considerable fragmentation by the ionization at 10.5 eV, while those of the functional molecules show strong peak at the parent mass with less fragmentation.
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О статье
Авторы: Ryuichi Kikkawa, Yoshiya Inokuchi, Takayuki Ebata, Hiroyuki Saigusa
Год: 2011
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Главный редактор |
Сергей Александрович МИРОШНИКОВ |
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