@article{article9481d861,
title   = {Quantitative assay of copper, iron, nickel, and zinc in fuel ethanol samples by flame atomic absorption spectrometry},
author = {Oliveira, Marcelo Firmino de and Balbo, Valdir Roberto and Andrade, José Fernando de and Saczk, Adelir Aparecida and Okumura, Leonardo Luiz and Stradiotto, Nelson Ramos},
year = {2008},
doi = {10.1007/s10553-009-0076-z},
journal   = {Chemistry and Technology of Fuels and Oils}
}