Table 2: Comparison between aqua regia extractable (indicative values) and “3-acid” extractable (this work) concentrations (mg/kg) of Cd, Cr, Cu, Ni, Pb, and Zn in sample BCR 701. Mean ± standard deviation of 3 replicates.

Indicative valuesThis work

Cd
Cr
Cu
Ni
Pb
Zn