Background signals-correction was made by employing a polarized Zeeman effect-based corrector and the temperature
program was that previously employed by our group for the determination of copper in aqueous solutions (Table 1)
[28], which allowed the determination of copper in the range 5–20_g l−1.
Palladium nitrate chemical modifier (10 _l of a 1000 mg l−1 solution) was employed in the analysis of all samples.