Cd . 18.8 mg/kg Cu.838 mg/kg Ni . 69.7 mg/kg Co . 7.39 mg/kg Hg.8.62 mg/kg Pb . 609 mg/kg Cr . 196 mg/kg Mn .324 mg/kg Zn. 3061 mg/kgAqua regia soluble contentCertified valuesCd . 18.5 mg/kg Cu.831 mg/kg Ni . 65.0 mg/kg Co . 6.5 mg/kg Hg.8.39 mg/kg Pb . 5