Cross polarization and magic angle spinning carbon-13 nuclear magnetic resonance spectrometry for quantitative analysis of coal and coal-derived solids

Journal Article · Tue Feb 01 04:00:00 EST 1983 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00253a051· OSTI ID:5087788

Yoshida, T; Maekawa, Y; Fujito, T

The effects of contact time and pulse repetition time on the quantitative aspects of cross-polarization and magic angle spinning (CP/MAS) spectra of coals and coal-derived solid products were studied to determine optimal conditions for quantitative analysis. For a coal-derived solid product which was soluble in hexane, a value for carbon aromaticity (f/sub a/) from both the CP/MAS solid-state spectrum and the solution spectrum was derived. The studies show that the f/sub a/ value obtained at various times in the CP/MAS experiments should be closest to the real value. The optimum values for contact time and pulse repetition time must be determined for each sample to obtain a reliable measurement of f/sub a/.

• Research Organization: Government Industrial Development Lab., Hokkaido, Japan
• OSTI ID: 5087788
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 55:2; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600* -- Coal
Lignite
& Peat-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400104 -- Spectral Procedures-- (-1987)
ALKANES
CARBONACEOUS MATERIALS
CHEMICAL ANALYSIS
COAL
COMPARATIVE EVALUATIONS
DATA
DISSOLUTION
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
HEXANE
HYDROCARBONS
INFORMATION
MATERIALS
MOLECULAR STRUCTURE
NMR SPECTRA
NUMERICAL DATA
ORGANIC COMPOUNDS
ORGANIC SOLVENTS
PULSE TECHNIQUES
QUANTITATIVE CHEMICAL ANALYSIS
RELIABILITY
SAMPLE PREPARATION
SOLIDS
SOLVENTS
SPECTRA
STRUCTURAL CHEMICAL ANALYSIS
TIME DEPENDENCE