[Quantitative spectrophotometric determination of prodigiozan in the visible spectrum].

A procedure for quantitative determination of prodigiosan in 0.02 per cent solutions in the visible region of the spectrum is described. The procedure is based on the ability of prodigiosan to affect the spectral properties of 1-ethyl-2-[3-(ethylnaphthyl [1,2d]-thiazolin-3-imidine)-2methyl propenyl]-naphtho-[1,2d]-thiazolin bromide (a dye).

[Spectrophotometric determination of prodigiozan in ampule solutions].

Based on a study of the absorption properties of prodigiosan it has been shown that its UV absorption spectrum is characterized by an arm at 250-260 nm with an inflection point at 260 nm. The concentration ranges within which the optical density of prodigiosan solution obeyed the Bouguer-Lambert-Beer law were measured. This allowed the development of a quantitative spectrophotometric method for determination of prodigiosan in ampouled solutions.