Studies on the Determinations of Chromium in the Environmental Atmosphere

Abstract

Investigations made to establish a method for determining hexavalent and total chromium in the environmental atmosphere have led to the following conclusions.
1) A loss of hexavalent chromium was observed when a high-volume air sampler was employed to collect chromium in air. It was concluded, therefore, that the use of a high-volume air sampler permitted the determination of total chromium, but not that of hexavalent chromium.
2) The most suitable means for collecting the hexavalent chromium in the environmental atmosphere was an impinger, and the best collecting solution was found to be a mixed solution made up from an APDC solution, an acetate buffer (pH 4) and an EDTA solution.
3) The environmental atmosphere was analyzed for hexavalent and total chromium by the present method, and the ratio of the hexavalent to the total chromium concentration was found to be within the range of 30 to 50%.