Method of analyzing marker dye concentrations in liquids

Details Method of analyzing marker dye concentrations in liquids Method of analyzing marker dye concentrations in liquids

G - Physics

01

N

G01N 33/22 (2006.01) G01N 30/00 (2006.01) G01N 33/28 (2006.01) G01N 30/16 (2006.01) G01N 30/18 (2006.01) G01N 30/62 (2006.01)

Patent

CA 2087579

ABSTRACT A method for determining the concentration of a tracer, e.g. nitrogen-bearing marker dye, in a hydrocarbon liquid, e.g. gasoline. In the present method, a sample of the marked hydrocarbon liquid which is to be analyzied is prepared by adding a known volume of a nitrogen-bearing, "internal standard" thereto. The sample is then heated, preferably in a gas chromatograph, to vaporize, separate, and measure the dye and the internal standard. These measurements provide a ratio which is matched or compared to a predetermined, reference ratio which, in turn, is representative of a known concentration of the dye in the sampled hydrocarbon.

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