Estimating molecular masses of petroleum-derived fractions: High mass (>2000u) materials in maltenes and asphaltenes from Maya crude oil
作者： T.J. Morgan , A. George , P. Alvarez-Rodriguez , M. Millan , A.A. Herod
DOI: 10.1016/J.CHROMA.2010.04.024
关键词:
摘要: Molecular mass ranges and average masses of fractions from a heavy Mexican crude oil (Maya) have been studied, using mainly size exclusion chromatography (SEC) laser desorption-mass spectrometry (LD-MS). Method development focused on the use planar (SEC), to isolate narrow bands material solubility-separated oil. The procedure provides based method for studying in complex hydrocarbon mixtures. It allows calculation 'best estimate' values number mass-averages. These can then be used structural parameter (ASP) calculations, features samples. is applicable both coal petroleum-derived molecular estimates arrived at this work samples are considerably higher than those reported by other workers similar results presented here provide strong evidence presence ions approaching m/z 10,000 Maya asphaltene. maltene fraction was found contain small amount with (m/z) excess 2000.
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