Comparative study of HPLC column packings for the separation of aromatic and polar compounds in fossil fuel liquids
This paper reports a study on normal phase high performance liquid chromatography (HPLC) separations of aromatic and polar compounds using the following packing materials: Nucleosil NO/sub 2/; Nucleosil NH/sub 2/; Nucleosil CN; Nucleosil SA; Lichrosorb Si-5; Lichrosorb Al-5; and TSK 111. The retention data of model aromatic compounds on each stationary phase are summarized. The largest factor (K') was obtained by using Nucleosil NO/sub 2/ column, with the exception of activated alumina. The retention behavior of selected polar compounds is summarized. Good separation of polar compounds from aromatic hydrocarbons was obtained except for that on TSK 111. As TSK 111 has no polar group on it, interaction with polar group in sample molecule is weak. The rather strong retention of phenols and indoles will be due to their electrophilic nature. Polar compounds were preferentially retained on the stationary phases other than TSK 111. Gradient elution was carried out for rapid elution of strongly retained molecules. From the data obtained, it is considered that polar-polar interactions including hydrogen bonding or acid-base interaction are the predominant separation mechanism, although the effect of alkyl substitution, especially at sterically hindered positions to polar groups, is not negligible. HPLC separations on coal tar and heavy petroleum fractions are described and chromatograms are presented.
- Research Organization:
- Nippon Mining Co., Ltd., Tokyo, Japan
- OSTI ID:
- 6494717
- Report Number(s):
- CONF-810308-(Vol.4)
- Journal Information:
- Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States), Journal Name: Am. Chem. Soc., Div. Fuel Chem., Prepr.; (United States) Vol. 26:2; ISSN ACFPA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
010600* -- Coal
Lignite
& Peat-- Properties & Composition
02 PETROLEUM
023000 -- Petroleum-- Properties & Composition
AROMATICS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COAL TAR
COLUMN PACKING
CONDENSED AROMATICS
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROXY COMPOUNDS
LIQUID COLUMN CHROMATOGRAPHY
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
PACKINGS
PETROLEUM
PETROLEUM FRACTIONS
PHENOLS
POLAR COMPOUNDS
SEPARATION PROCESSES
TAR