A method for quantitative determination of gold, lead, nickel, cobalt in a range of concentrations from mg/g to ng/g was
proposed. Method consists of annealing, treatment with acids followed by extraction. Determination of nickel, cobalt and lead
was carried out after the decomposition of the sample, without discharge of the sample matrix. Method was tested by certified
reference material and various rock samples. Method can be applied for determination of corresponding metals in ores, rocks and
waste mining industry.