Photometric determination of cyanide. • Photometric determination with barbituric acid/pyridine. • 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: standard test 1-30 • Range: 10 mm cuvette: 0.01 - 0.50 mg/l CN- 50 mm cuvette: 0.001 - 0.100 mg/l CN- • Sufficient for: 250 determinations • Sea water suitability: yes