Pyrolysis/gas chromatography/mass spectr
โ
M. Nali; V. Calemma; L. Montanari
๐
Article
๐
1994
๐
John Wiley and Sons
๐
English
โ 501 KB
Two n-heptane-precipitated asphaltene samples, characterized by elemental analysis and nuclear magnetic resonance spectrometry, were fractionated according to relative molecular size by gel permeation chromatography (CPC). Both the whole asphaltene samples and their fractions were analysed by pyroly