G - Physics – 01 – N
Patent
G - Physics
01
N
73/97
G01N 30/00 (2006.01) G01N 21/33 (2006.01) G01N 30/78 (2006.01) G01N 33/28 (2006.01) G01N 30/02 (2006.01) G01N 30/68 (2006.01) G01N 30/74 (2006.01)
Patent
CA 2037398
ABSTRACT OF THE DISCLOSURE The invention is a method for quantitatively determining the amount of saturate, olefin and aromatic components in a composition or mixture. The method involves contacting a sample of a composition with a stationary phase; separating the saturates, olefins and aromatics loaded on the stationary phase by passing a supercritical fluid mobile phase through the stationary phase to obtain an eluent, wherein the amount of satu- rates, olefins and aromatics in the eluent varies over time and passing the eluent through an ultraviolet absorption (Uv) detector for irradiating the eluent with ultraviolet light at a wavelength capable of producing a uniform ultraviolet absorbance response for the olefins in the sample; measuring the ultraviolet absorbance of the olefins in the eluent; passing the eluent through a mass detector (FID), capable of measuring the mass response to saturates, olefins and aromatics in the eluent and determining the quantita- tive amounts of saturates, olefins and aromatics in the composition from the detectors.
Genowitz Mark Wayne
Schulz Wolfgang Walter
Borden Ladner Gervais Llp
Exxon Research And Engineering Company
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