A method is described for the determination of tritium in liquid organic products. The analysis is based on the oxidation of these substances in a reactor containing copper (II) oxide 400-500/sup 0/C in an inert gas atmosphere, condensation of the obtained tritiated water vapor, and determination of the concentration of tritium in the isolated and purified samples of water by liquid scintillation radiometry. The sensitivity of the analysis amounts to about 1 Bq/cm/sup 3/.