FIELD: analytical chemistry, spectrophotometric methods of detection of medicine means - cyclometiazide. SUBSTANCE: method consists in that cyclometiazided is subjected to acidic hydrolysis and formed product of acidic hydrolysis is brought into reaction of diazotization. Diazonium salt formed as result of reaction of diazotization is brought into reaction of interaction with alcohol solution of 3-α, g- dicarboxypropylrodanine in alkaline medium. Obtained colored solution is scanned photometrically on 499 nm. EFFECT: high accuracy of determination, enhanced sensitivity and selectivity. 5 tbl
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