Chemistry: analytical and immunological testing – Tracers or tags
Patent
1997-06-30
1999-09-28
Alexander, Lyle A.
Chemistry: analytical and immunological testing
Tracers or tags
436 60, 436139, 436 27, 73 6144, G01N 3322
Patent
active
059587806
ABSTRACT:
Methods for marking a liquid and methods and systems for identifying marked liquids. A liquid can be marked for identification purposes with at least a first marker and a second marker. Each of the markers is miscible with the liquid. The markers are mixed in the liquid so that the ratio of the concentration of the first marker to the concentration of the second marker is substantially equal to a predetermined value. Thus, when a system according to the invention measures the concentrations of the first and second markers, the system can compare the ratio of the measured concentration of the first marker to the measured concentration of the second marker with a look up table of the predetermined values to provide information concerning the identity of the liquid. In a preferred embodiment, the concentration of the markers is measured using an absorption spectrometer. When using an absorption spectrometer to measure the concentration of the markers, each of the markers has an absorbance spectrum with at least one wavelength range where the marker's absorbance is differentiable from the absorbance of the background liquid and any other marker in the liquid.
REFERENCES:
patent: 4209302 (1980-06-01), Orelup
patent: 4278444 (1981-07-01), Beyer et al.
patent: 4606859 (1986-08-01), Duggan et al.
patent: 4918020 (1990-04-01), Nowak
patent: 5156653 (1992-10-01), Friswell et al.
patent: 5225679 (1993-07-01), Clarke et al.
patent: 5229298 (1993-07-01), Zoumalan
patent: 5279967 (1994-01-01), Bods
patent: 5466826 (1995-11-01), Cuthbert
patent: 5474937 (1995-12-01), Anderson et al.
patent: 5525516 (1996-06-01), Krutak et al.
patent: 5569922 (1996-10-01), Clarke
patent: 5677186 (1997-10-01), Anderson et al.
patent: 5677187 (1997-10-01), Anderson et al.
Asher William E.
Clarke Richard H.
Farahat Mohammad S.
Alexander Lyle A.
Boston Advanced Technologies, Inc.
Engellenner Thomas J.
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