FIELD: analytical chemistry. SUBSTANCE: method of clophelin tablet determination involves preparation grinding in buffer solution at pH = 3.3 ± 0.2 in the presence of bromphenol blue. Ionic complex of clophelin with bromphenol blue is extracted with organic solvent - chloroform. Organic phase is filtered through anhydrous sodium sulfate and subjected for photometry at 410 nm. Clophelin content in tablet is calculated using data obtained for clophelin standard sample. EFFECT: high sensitivity and precision of assay. 1 dwg
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