Fig. 1

Nickel (A; squares) and aluminum (B; circles) concentrations as mean and standard error of three measurements each for two experimental eluate replicates, as detected by ICP-MS (for Ni) and ICP-OES (for Al). Limits of detection (LOD; blue line) and limits of quantification (LOQ; red line) for the two elements are indicated. Eluates were prepared according to OECD No. 29 with 100 mg/L sample material and a 7-day elution period