Measuring and testing – Liquid analysis or analysis of the suspension of solids in a... – Content or effect of a constituent of a liquid mixture
Patent
1998-09-01
2000-03-14
Williams, Hezron
Measuring and testing
Liquid analysis or analysis of the suspension of solids in a...
Content or effect of a constituent of a liquid mixture
73 6143, 250576, 436172, G01N 1100, G01N 2100, G01N 2185
Patent
active
060357053
ABSTRACT:
In a principal embodiment, the invention relates to a method in which a water sample containing dissolved hydrocarbon fuel to be identified is contacted with a fiber optic element adapted to adsorb a hydrocarbon fuel on at least a portion of the element, for a time sufficient to adsorb a characterizing amount of the fuel from the water sample. The fiber optic element containing adsorbed hydrocarbon fuel is then removed from the water sample, and then at least the portion of the fiber optic element containing adsorbed fuel is immersed in or surrounded with water. The adsorbed hydrocarbon fuel is allowed to desorb from the fiber optic element while the rate of desorption of the fuel from the fiber optic element is measured by a fiber optic chemical sensor system of which the fiber optic element is a part. The set of values derived from the concentration measurements together identify or characterize the hydrocarbon fuel, and may further be represented mathematically by a desorption ratio value which is characteristic of the fuel.
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Adamcik Albert J.
Marathon Ashland Petroleum LLC
Politzer Jay L.
Stone Richard D.
Williams Hezron
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