Accuracy of the developed method was verified by analysis of
the certified reference material (NCS ZC 85006 Tomato). The obtained
results for ICP-OES and F-AAS measurements are shown in
Table 3. The results of this work and certified values for Cd, Cu,
Ni, Pb and Zn are in good agreement. The developed method of preconcentration
of Cd, Cu, Ni, Pb, and Zn can be successfully used for
determination of selected metals in unknown plant materials