Group-type separation of diesel fuels using packed capillary column supercritical fluid chromatography

Journal Article · Wed Feb 01 04:00:00 EST 1995 · Analytical Chemistry (Washington); (United States)

DOI:https://doi.org/10.1021/ac00099a024· OSTI ID:6778283

Li, W; Malik, A; Lee, M L ^[1]; Jones, B A; Porter, N L; Richter, B E ^[2]

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1. Brigham Young Univ., Provo, UT (United States)
2. Dionex Corp., Salt Lake City, UT (United States)

Determination of the aromatic hydrocarbon content of diesel fuels by supercritical fluid chromatography (SFC) has been approved as an American Standard Test Method. Commercially available microbore columns usually used in this application suffer from poor stability and low resolution. In this work, 200 [mu]m i.d. packed capillary SFC columns were prepared, and their chromatographic performances were compared with commercial microbore columns. Various packing materials with different pore sizes were evaluated, and the effects of column temperature and pressure were carefully examined. It was found that the pore size of the packing material and, therefore, the surface area had a significant effect on elution order. Using a 1 m long column, a resolution of as high as 15 for n-hexadecane and toluene was achieved within 5 min at 45[degree]C. The column performance was very reproducible; day-to-day and month-to-month resolution variations were less than 3%, and retention time variations were less than 1%. In this method, no additional columns and valve switching were involved. The method is simple, fast (approximately 10 min), and very suitable for quality control analysis. 35 refs., 5 figs., 7 tabs.

• OSTI ID: 6778283
• Journal Information: Analytical Chemistry (Washington); (United States), Journal Name: Analytical Chemistry (Washington); (United States) Vol. 67:3; ISSN 0003-2700; ISSN ANCHAM
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020500* -- Petroleum-- Products & By-Products
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400105 -- Separation Procedures
400201 -- Chemical & Physicochemical Properties
ALKANES
ALKYLATED AROMATICS
AROMATICS
CHEMICAL ANALYSIS
CHROMATOGRAPHY
CONTROL
DATA
DIESEL FUELS
DISTILLATES
ENERGY SOURCES
EXPERIMENTAL DATA
EXTRACTION APPARATUSES
EXTRACTION COLUMNS
FOSSIL FUELS
FUELS
GAS OILS
HEXADECANE
HYDROCARBONS
INFORMATION
LIQUID FUELS
NUMERICAL DATA
ORGANIC COMPOUNDS
PACKED BEDS
PETROLEUM
PETROLEUM DISTILLATES
PETROLEUM FRACTIONS
PETROLEUM PRODUCTS
QUALITY CONTROL
QUANTITATIVE CHEMICAL ANALYSIS
SEPARATION EQUIPMENT
SEPARATION PROCESSES
SUPERCRITICAL FLUID CHROMATOGRAPHY
TOLUENE