Cd . 1.82 mg/kgCu .308 mg/kgNi. 47.7 mg/kgCo . 15.0 mg/kgHg .．.3.14 mg/kgPb.106 mg/kgCr . 104 mg/kgMn.208 mg/kgZn . 932 mg/kgAqua Regia solubile contentCertified valuesCd . 1.84 mg/kgCu .300 mg/kgNi. 44.9 mg/kgCo . 13.3 mg/kgHg .3.11 mg/kgPb. 96.0 mg/kgCr