FIELD: pharmaceutical industry. SUBSTANCE: invention relates to method of determination of active substance in soft medicinal forms. Diphilic ointment bases are extracted with 0.9% sodium chloride solution at pH 7.0-8.0 for 20-90 min. Extract is clarified, an aqueous phase is removed and specific activity is determined after extraction directly. EFFECT: increased precision of assay. 3 tbl, 2 ex
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