SOLVENT-BASED VS. SOLVENT-FREEMALDI-TOF-MS SAMPLE PREPARATIONMETHODS FOR THE QUANTITATIVEANALYSIS OF PETROLEUMMACROMOLECULES

摘要

Petroleum pitches are formed from the thermal polymerization of aromatic decant oil, which is a by-product of the fluid catalytic cracking (FCC) operation. The MALDI mass spectrum of petroleum pitch, shown in Fig. 1, indicates the oligomeric nature of the pitch, which exhibits a broad molecular weight distribution (MWD) ranging from 200 to 2000 Da [1, 2].