000			01884nab a2200205 4500
005			20260520000836.0
008			260224s2009 xxu
245	0	0	_aAnalysis of asphaltenes and asphaltene model compounds by laser-induced acoustic desorption/Fourier Transform ion cyclotron resonance mass spectrometry
260			_a _b _cnov./dic. 2009
270			_a08/06/2010 ; 08/06/2010
300			_a6 p. ; 5564-5570
520			_aTranscripción del resumen del autor. Laser-induced acoustic desorption (LIAD)/electron ionization (EI) was used to study asphaltene model compounds and asphaltenes derived from North American crude oil in a Fourier transform ion cyclotron resonance (FT-ICR) mass spectrometer (MS). Successful desorption by LIAD of all model compounds (including a polyphenylated vanadoyl porphyrin) as intact neutral molecules into the mass spectrometer indicates that this method allows the evaporation of most if not all components of asphaltenes into mass spectrometers for further characterization. Electron ionization is a universal ionization method that ionizes all organic compounds. Hence, it is not surprising that all the model compounds studied were successfully ionized by using this method. Furthermore, this method yielded stable molecular ions for all model compounds studied. Because LIAD/EIMS provides MW information for these model compounds, this is almost certainly also true for all components of asphaltenes. Examination of asphaltene samples derived from North American crude oil by using this technique yielded a MW distribution of about 350-1050 Da and provided structural information for asphaltene components.
581			_a6
773	0		_tEnergy & fuels _g23
942			_cARTICULO
100	1		_aPinkston, David S. _942284
100	1		_aDuan, Penggao _942285
100	1		_aGallardo, Vanessa A. _942286
999			_c170792 _d170792