Tandem mass spectrometry for characterization of high-carbon-number geoporphyrins

Journal Article · Sun Jun 01 04:00:00 EDT 1986 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00298a012· OSTI ID:5599290

Johnson, J V; Britton, E D; Yost, R A; Quirke, J M.E.; Cuesta, L L

Geoporphyrins are separated into TCL fractions after being isolated from Boscan oil (West Venezuela) by column chromatography. Analysis of each fraction by electron ionization mass spectrometry identified the porphyrin classes present and their carbon number ranges, but the spectra were extremely complex. Tandem mass spectrometry (MS/MS) allowed selection of molecular ions of individual carbon number porphyrins of the DPEP and etio types for fragmentation by collisionally activated dissociation. Comparison of their daughter and neutral loss spectra with those of porphyrin standards provided the first structural information on individual high-carbon-number geoporphyrins (>C/sub 33/). This information is helpful in the study of their geologic evolution and suggests the potential for using MS/MS data on high-carbon-number geoporphyrins as a parameter in oil exploration. Metalated and demetalated porphyrins of the same carbon number produced similar spectra, suggesting that samples may require less treatment for analysis by MS/MS than by conventional MS.

• Research Organization: Univ. of Florida, Gainesville
• OSTI ID: 5599290
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 58:7; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020200 -- Petroleum-- Reserves
Geology
& Exploration
023000* -- Petroleum-- Properties & Composition
CARBOXYLIC ACIDS
DATA
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GEOLOGIC HISTORY
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
INFORMATION
MASS SPECTRA
MASS SPECTROSCOPY
NUMERICAL DATA
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
PETROLEUM
PETROLEUM FRACTIONS
PORPHYRINS
SPECTRA
SPECTROSCOPY
STRUCTURAL CHEMICAL ANALYSIS