Photometric determination of Cyanide. • Photometric determination with chloroamine T. • Cyanide ions react with chloroamine T to form cyanogen chloride which, with a pyridine derivative and barbituric acid forms a polymethine dye. • The test measures free cyanide and cyanide complexes which can be destroyed with chlorine. • Type: tube test 0-31. • Range: 0.02 - 0.80 mg/l CN-; when using semi-micro cuvettes 50 mm: 0.002 - 0.100 mg/l CN-. • Sufficient for: 20 determinations. • Sea water suitability: yes, after dilution (1:4).