Hydroxyl determination in petroleum oil extracts by fluorine-19 and silicon-29 nuclear magnetic resonance spectrometry

Journal Article · Fri Nov 30 23:00:00 EST 1984 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00278a026· OSTI ID:5808477

Dereppe, J M; Parbhoo, B

Qualitative and quantitative analyses of hydroxyl functions in two asphaltenes and in acidic extracts of two petroleum oils are determined by fluorine-19 and silicon-29 NMR spectroscopy. Acidic hydrogens are specifically substituted either by trifluoroacetyl or by trimethylsilyl groups with trifluoroacetic anhydride and hexamethyldisilazane, respectively. Asphaltenes are extracted from treated beech and poplar wood. /sup 19/F and /sup 29/Si NMR signals are analyzed on the basis of chemical shift and integral measurements. Oxygen quantity characterized by NMR together with total oxygen content determined by elemental analysis gives an estimation of non-hydroxyl oxygen atoms embedded in molecular structures of these petroleum oils extracts.

• Research Organization: Catholic Univ. of Louvain, Belgium
• OSTI ID: 5808477
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 56:14; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
ASPHALTENES
ASPHALTS
BITUMENS
CHEMICAL ANALYSIS
DATA
ELEMENTS
ENERGY SOURCES
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FLUORINE 19
FLUORINE ISOTOPES
FOSSIL FUELS
FUELS
HYDROGEN
HYDROXYL RADICALS
INFORMATION
ISOTOPES
LIGHT NUCLEI
MAGNETIC RESONANCE
MOLECULAR STRUCTURE
NONMETALS
NUCLEAR MAGNETIC RESONANCE
NUCLEI
NUMERICAL DATA
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXYGEN
PETROLEUM
PH VALUE
QUALITATIVE CHEMICAL ANALYSIS
QUANTITATIVE CHEMICAL ANALYSIS
RADICALS
RESONANCE
SILICON 29
SILICON ISOTOPES
STABLE ISOTOPES
TAR