[Photometric determination of monomycin in biological materials]

A photometric procedure for determination of monomycin in biological materials, such as blood, milk, urine was developed on the basis of the investigation of the reaction of monomycin complex formation with phthalexon-S and praseodymium in water-ethanol medium (1 : 1). The error of estimation of 0.1 microgram of monomycin in 1 ml of a biological material did not exceed 5 per cent (rel.).