METHOD OF IDENTIFYING NARCOTIC AND PSYCHOACTIVE SUBSTANCES IN BIOLOGICAL FLUIDS Russian patent published in 2010 - IPC G01N30/86 

FIELD: physics.

SUBSTANCE: method is proposed for identifying narcotic and psychoactive substances in biological fluids, where two aliquot samples of the analysed specimen are prepared - native and derived. Each of the two aliquot samples is passed through a column in at least two modes of conditioning parametres of temperature gradient variation. Each of the said aliquots is additionally passed through the column with division of the stream in the same conditioning modes. Further, detector signals are picked up on chromatograms. Peaks with asymmetry values on 0.1; 0.5 and 0.6 the height of the peak from the base ≤1.05 are selected on the chromatograms as best corresponding to binomial distribution of probability density and undeformed by effect of background components. Further, detected substances are identified on the selected peaks by comparing with standard analytical characteristics of the detected substances.

EFFECT: increased efficiency and accuracy of detection, possibility of unique identification of chemical compounds and their fragments in arbitrary combinations.

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