Combined liquid chromatography/mass spectrometry of tetrapyrroles of sedimentary significance

The on-line coupling of a high-performance liquid chromatograph to a mass spectrometer (LC/MS) has allowed the analysis of a number of tetrapyrrole pigments of sedimentary significance. Mass spectra were obtained under conditions of discharge ionization and are characterized by the presence of proto...

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Bibliographic Details
Published in:Energy & fuels 1990-11, Vol.4 (6), p.741-747
Main Authors: Eckardt, C. B, Carter, J. F, Maxwell, J. R
Format: Article
Language:English
Subjects:
02 PETROLEUM
023000 - Petroleum- Properties & Composition
Applied sciences
AZOLES
BIOLOGICAL MARKERS
CARBOXYLIC ACIDS
CHROMATOGRAPHY
Crude oil, natural gas and petroleum products
DATA
Earth sciences
Earth, ocean, space
Energy
Exact sciences and technology
FRAGMENTATION
Fuels
Geology and geochemistry. Geological and geochemical prospecting. Petroliferous series
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
Hydrocarbons
INFORMATION
IONIZATION
LIQUID COLUMN CHROMATOGRAPHY
MASS SPECTRA
MASS SPECTROSCOPY
MATURATION
MOLECULAR STRUCTURE
MOLECULAR WEIGHT
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC MATTER
ORGANIC NITROGEN COMPOUNDS
PIGMENTS
PORPHYRINS
Prospecting and exploration
Prospecting and production of crude oil, natural gas, oil shales and tar sands
PYRROLES
Sedimentary rocks
SEDIMENTS
SEPARATION PROCESSES
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS
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Description
Summary:The on-line coupling of a high-performance liquid chromatograph to a mass spectrometer (LC/MS) has allowed the analysis of a number of tetrapyrrole pigments of sedimentary significance. Mass spectra were obtained under conditions of discharge ionization and are characterized by the presence of protonated ion species (positive-ion mode) or molecular ions (negative-ion mode), respectively. Fragmentation processes were found to be restricted to the periphery of the structures. In the positive-ion mode the extent of fragmentation could be manipulated by alteration of the repeller voltage in the ion source, allowing molecular weight information to be obtained, as well as specific fragmentation patterns. These findings have suggested a number of applications of LC/MS in the investigation of sedimentary tetrapyrrole distributions. In particular, the assignment of individual components in mixtures without resort to their isolation is possible from comparison of mass spectra with those of authentic standards and from coinjection with the standards.
ISSN:0887-0624
1520-5029
DOI:10.1021/ef00024a021