PETR 43 |
| Laser-induced acoustic desorption (LIAD) coupled with chemical ionization mass spectrometry is demonstrated to allow the simultaneous analysis of both the nonpolar and polar components in petroleum. LIAD successfully desorbs all the compounds as intact neutral molecules into the mass spectrometer. Chemical ionization by using the ClMn(H2O)+ ion ionizes all the hydrocarbons by producing only pseudomolecular ions via loss of H2O. No fragmentation was observed even for highly branched saturated hydrocarbons. Hence, this experiment yields molecular weight information for all petroleum components. Furthermore, very different types of compounds react at similar efficiencies with ClMn(H2O)+ which facilitates quantitative analysis of petroleum. |
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Symposium Honoring Martin Gorbaty
8:20 AM-11:55 AM, Monday, August 20, 2007 Boston Park Plaza -- Plaza Ballroom, Oral
Division of Petroleum Chemistry |