[Nickel and chromium. Analysis of 3 detergents using atomic absorption spectrophotometry].

It is well known that Nickel and Chromium are present, at different concentrations, in detergents used for washing-up, hand-washing and cleaning surfaces. In the present study we have analysed three trade marks of detergents (one for each different use) to evaluate, by means of atomic absorption spectroscopy, whether the concentrations previously detected are specific to a particular trade mark or are connected with the metals concentration variability typical of all detergents as commercial products. According to our results, Nickel and Chromium are always present, at different concentrations, in all the samples tested; detergents used for hand-washing contain the highest Nickel percentage; the concentrations observed show discrete variations also within the same trade mark.