FIELD: chemistry.
SUBSTANCE: method involves treatment of the solution of a sample with aqueous solutions of 4, 4'-bis(2-oxy-6,8-disulpho-1-naphthylazo)diphenylsulphide, potassium hydroxide and cetyltrimethylammonium chloride in volume ratio of 2:1:1:1 respectively, with subsequent measurement of optical density and determination of content of the cyanide anion using a calibration curve.
EFFECT: simpler and faster analysis.
3 dwg
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