METHOD OF DETECTING RIFAMPICIN Russian patent published in 2010 - IPC G01N33/15 G01N21/33 A61K31/498 

FIELD: chemistry.

SUBSTANCE: solution of the analyte and comparison sample are prepared. The solvent used for preparing the test samples is 0.1 M hydrochloric acid solution. The comparison sample used is potassium ferricyanide or benzoic acid. Optical density of the solution of the analyte and comparison sample of potassium ferricyanide or benzoic acid is measured on a spectrophotometre at wavelength 266 nm. Results are calculated using a formula by entering a conversion coefficient into the formula.

EFFECT: method increases reproducibility of measurement results, reduces cost, labour input, analytical error and enables unification of the analysis method.

3 ex