April 2014
Chemical Industry & Chemical Engineering Quarterly;2014, Vol. 20 Issue 2, p155
Academic Journal
A new simple and sensitive detection tube to detect hydrogen cyanide in the air has been developed. The detection tube is based on the reaction of hydrogen cyanide with 4-nitrobenzil to form a violet colored product. The reaction takes place on a carrier made of a composite material, which was prepared by pelletization of a mixture of microcrystalline cellulose and MgO. The detection tube can detect hydrogen cyanide in the air in the range of concentrations 0.1-100 mg m-3 based on visual evaluation (by naked eye) of the change of indication layer coloring and comparison with etalon. The detection limit is 0.05 mg m-3. The detection tube is highly selective and sufficiently stable during storage.


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