Methods for the identification and extraction-spectrophotometric determination of biologically active organic polyiodides

Spectroscopic (H-1 NMR and UV) and chromatographic (TLC) methods were propo sed for the identification and determination of the purity of biologically active iodine-containing organic compounds. A sensitive extraction-photomet ric method was developed for the quantitative determination of preparations by the formation of ion associates of the triiodide ion with the cation of 1,3-dimethyl-2-(4-piperidynophenyl)azobenzimidazoliumphenylsulphate dye [e psilon(580) = (3.2-3.4) x 10(4); m(min) = 0.8-1.6 mu g]. The method is char acterized by high precision (RSD less than or equal to 0.6%).