[Quantitative determination of the antibiotic doxorubicin by high-performance liquid chromatography].

A new three-component system was developed for separation of a mixture containing 6 components: doxorubicin, rubomycin, dihydrorubomycin, 14-bromrubomycin, doxorubicinone and rubomycinone. The system uses reverse phase high performance liquid chromatography. Separation was performed on a column with Spherisorb C18 (4.6 X 250 mm) with the particle size of 10 microns. Relationships between the capacity factor k1 for the above 6 components and relative arresting alpha for 3 hardly separating components: doxorubicin, rubomycinone and dihydrorubomycin, as well as between the percentage content of the organic component, acetonitrile and the percentage content of the buffer solution were studied. The external standard method was used for determination of purity of doxorubicin standard preparations. The method provides routine quantitative assay of doxorubicin hydrochloride.