Supercritical fluid chromatographic determination of hydrocarbon groups in gasolines and middle distillate fuels
A supercritical fluid chromatographic method to determine the percentage of saturates, olefins, and aromatics in gasolines and middle distillate fuels was developed. A microbore (1 mm i.d.) silica gel column was used to isolate and determine the aromatics, while a silver-ion-loaded strong cation exchange silica gel microbore column was used to separate the saturates from the olefins and aromatics. Olefins were determined by difference or by using a column switching technique which allows complete separation of saturates, olefins, and aromatics in a single run. A mixed mobile phase of 10% CO/sub 2/ in SF/sub 6/ (mole percent) was used for both columns, and a flame ionization detector provided uniform, linear response of the hydrocarbons, allowing quantitation with minimal calibration. The average absolute error was 1.5%, while the standard deviation of the area percent of the aromatics of one gasoline sample was 0.5%. Analysis times of under 60 min were achieved.
- Research Organization:
- Brigham Young Univ., Provo, UT
- DOE Contract Number:
- FG02-86ER60445
- OSTI ID:
- 5589280
- Journal Information:
- Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 60:4; ISSN ANCHA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
023000* -- Petroleum-- Properties & Composition
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102 -- Chemical & Spectral Procedures
400105 -- Separation Procedures
ALKENES
AROMATICS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DATA
DISTILLATES
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
GASOLINE
HYDROCARBONS
INFORMATION
LIQUID FUELS
NUMERICAL DATA
ORGANIC COMPOUNDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION PROCESSES
SUPERCRITICAL FLUID CHROMATOGRAPHY