[Detection of trivalent chromium in the air]

The study was designed to develop an accelerated technique of air identification of trivalent chromium. The technique for alkali melting at 800-850 degrees, traditionally used for sample preparation, was replaced by acid treatment by a mixture of nitric, hydrochloric and chloric acids. Thus trivalent chromium was oxidized into hexavalent one, which was determined by means of the photocolorimetric technique by its reaction with diphenylcarbazite. The technique enabled one to lower the time for the analysis by 4 hours.