METHOD FOR DETERMINATION OF SODIUM PARA-AMINOSALYCYLATE Russian patent published in 2010 - IPC G01N33/15 G01N21/00 G01N21/33 A61K31/196 

FIELD: medicine.

SUBSTANCE: solutions of a substance to be determined and a reference sample are prepared. 0.1 M sodium hydroxide is used as a solvent for preparing the analysed solutions. Potassium chromate or potassium ferricyanide is used as a reference sample. The optical density of the solution of the analysed substance and the reference sample of potassium chromate or potassium ferricyanide is measured by a spectrophotometre at wave length 264 or 298 nm respectively. The results are calculated by formula with an introduced conversion factor.

EFFECT: higher reproducibility of results of determination and reduced analytical error.

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