[Use of colored samples in the detection of occupational exposure to allergic effects of chromium and nickel compounds].

By using a coloured sample with diphenylcarbazide, chromium content in raw materials and industrial intermediate products was determined. At the same time chromium content was determined quantitatively by atomic absorption. The method was said to be simple and easy to be done in any industrial physician's conditions. The sample's sensitivity was said to be 1:100 000. Results of the determinations indicated that protective leather gloves contained considerable content of chromium, and chromium-free machine oils and lubricants were polluted with chromium's minute quantities as the oils and lubrications were being used. It was stated that coloured samples aiming at the detection of chromium, cobalt and nickel should be routinely used in preventive activity of industrial physicians.