CONCLUSION
The determination of As, Fe, Mn, Sb, Sn and Pb in electrolytic copper could be successfully carried out by ICP OES and ICP-MS. A previous separation of Cu by electrodeposition is recommended, in order to reduce the metal load introduced into the plasma, being mandatory for the ICP-MS technique, in order to avoid the corrosion of the cones. The ICP-MS provide higher sensitivity and precision, allowing the determination of all analytes in concentrations lower than the limit values, demonstrating to be a powerful technique for the quality control of electrolytic copper manufacturing.