Determination of chromium in natural waters and sewage effluents by atomic-absorption spectrophotometry using an air-acetylene flame

Abstract

A simple method for the determination of chromium in natural waters and sewage final effluents by atomic-absorption spectrophotometry using an air-acetylene flame is described. The sample is concentrated by evaporation by a factor of five. Interference effects were minimised by the addition of ammonium perchlorate and were further reduced by working with a flame on the verge of luminosity rather than a distinctly luminous flame.