Fig. 2

Measured amounts of metal (µmol) in treated (grey bars) and untreated skin (white bars) following exposure to metals in Milli-Q water, 0.5% SLS and ethanol for 2 and 8 h, respectively. Results from single exposure to nickel is shown in the top row. The results for the combined exposure to equimolar amounts of nickel, cobalt and chromium are displayed per metal (middle section) and added (bottom). Data is presented as mean values of from six replicate experiments (n = 6, data points) with bars showing the standard deviation. Statistically significant relationships were indicated as (*) for p-values < 0.01 and (**) for p-values < 0.001