Development and optimization of methodologies for analysis fo complex hydrocarbon mixtures. Technical progress report, 1 September 1980-31 August 1981
Studies of rotating-disk thin-layer chromatography were continued from the previous grant period, and fundamental aspects of this newly-revived technique were examined in this period in some detail. A number of design innovations were explored, implementation of which could result in a separations system which rivals conventional-column lc for pre-analysis fractionation of petroleum. Studies with liquid-chromatographic (lc) columns of conventional dimensions examined the variation of retentions of aromatic hydrocarbon solutes with mobile phases of methanol + water (reversed-phase sorbent) and hexane + isopropyl alcohol (silica sorbent). The utility of ternary blends of hexane solvent + combinations of methylene chloride, tetrahydrofuran, acetonitrile, and isopropyl alcohol were also evaluated with silica adsorbent and polycyclic aromatic hydrocarbon solutes. Resolution of a small impurity in one of the solute mixtures was used to illustrate the effects of column temperature. Microbore reversed-phase column systems were examined from the standpoints of efficiency and analysis times. Optimization of conditions relating to the fabrication and use of open-tubular gc glass-capillary columns were continued. These efforts included studies of the controlled and predictable variation of retentions with composition of the (multi-component) stationary and mobile phases. Total analysis of a commercial gasoline provided illustration of the ultrahigh resolution available from the resultant column systems. Other studies included clean-up procedures for lc solvents, computer data acquisition and reduction techniques for gc and lc, detector and recorder distortion of chromatographic peaks in gc, and new methods of data presentation and pattern recognition for spectra of levels of complexity of those generated in this work.
- Research Organization:
- Ohio State Univ., Columbus (USA). Dept. of Chemistry
- DOE Contract Number:
- AC02-80ER10554
- OSTI ID:
- 6127833
- Report Number(s):
- DOE/ER/10554-7; ON: DE81025875
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHROMATOGRAPHY
RESEARCH PROGRAMS
ORGANIC COMPOUNDS
PETROLEUM
THIN-LAYER CHROMATOGRAPHY
OPTIMIZATION
EXTRACTION COLUMNS
EFFICIENCY
LIQUID COLUMN CHROMATOGRAPHY
POLYCYCLIC AROMATIC HYDROCARBONS
GAS CHROMATOGRAPHY
GASOLINE
ORGANIC SOLVENTS
ROTATION
CHLORINATED ALIPHATIC HYDROCARBONS
HEXANE
NITRILES
PROPANOLS
SILICA
TEMPERATURE EFFECTS
TETRAHYDROFURAN
ALCOHOLS
ALKANES
AROMATICS
CHALCOGENIDES
ENERGY SOURCES
EXTRACTION APPARATUSES
FOSSIL FUELS
FUELS
FURANS
HALOGENATED ALIPHATIC HYDROCARBONS
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
HYDROXY COMPOUNDS
LIQUID FUELS
MINERALS
MOTION
ORGANIC CHLORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PETROLEUM PRODUCTS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SILICON COMPOUNDS
SILICON OXIDES
SOLVENTS
400105* - Separation Procedures
400102 - Chemical & Spectral Procedures