학술논문
Dimethylcarbazoles in crude oils: comment on 'Liquid chromatographic separation schemes for pyrrole and pyridine nitrogen aromatic heterocycle fractions from crude oils suitable for rapid characterization of geochemical samples.' (response to Li et al., Analytical Chemistry, vol. 64, 1992, p. 1337)
Document Type
Academic Journal
Author
Source
Analytical Chemistry. August 1, 1997, Vol. 69 Issue 15, p3128, 2 p. graph
Subject
Language
ISSN
0003-2700
Abstract
Li et al. examined peak assignments for carbazole, the methylcarbazoles and different C2-alkylcarbazoles in an attempt to study chromatographic techniques for separating pyrrolic and pyridinic nitrogent compounds from petroleum. However, the peak assignments discussed by the researchers for many C2-alkylcarbazoles have proven to be incorrect, based on standard compound coinjection analyses that involve gas chromatography/mass spectrometry. Nevertheless, the original finding that the migrated oils were improved in shielded and partly shielded isomers has been supported.