Certified valuesCd . 14.6 mg/kg Cu.46.4 mg/kg Ni . 103 mg/kg Co . 10.5 mg/kg Hg.0.25 mg/kg Pb . 57.2 mg/kg Cr . 195 mg/kg Mn .683 mg/kg Zn. 283 mg/kgAqua regia soluble contentCertified valuesCd . 14.0 mg/kg Cu.46.9 mg/kg Ni . 94 mg/kg Co . 9.2 mg/kg Hg.0.