The relative standard derivations (n = 12) were 60.5 Cu and 60.7 Pb. Accuracy was checked for Cu and Pb determination in 10 samples purchased at local gas stations in Brazil.
The relative standard derivations (n = 12) were 60.5 Cu and 60.7 Pb.Accuracy was checked for Cu and Pb determination in 10 samples purchased at local gas stations in Brazil.