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

1992-01-24

1993-07-20

Housel, James C.

Chemistry: analytical and immunological testing

Nitrogen containing

Amine and quaternary ammonium

436106, 436141, 436139, 436161, 73 2338, 252 11, G01N 3302, G01N 3322

Patent

active

052292983

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.

REFERENCES:
patent: 4049393 (1977-08-01), Orelup
patent: 4209302 (1980-06-01), Orelup
patent: 4764290 (1988-08-01), Currey
patent: 4764474 (1988-08-01), Orelup
patent: 4918020 (1990-04-01), Nowak

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