TY - GEN AU - Teixeira,Leonardo Sena Gomes AU - Santos,Elenir Souza AU - Nunes,Luana Sena TI - Determination of copper, iron, nickel and zinc in ethanol fuel by energy dispersive X-ray fluorescence after pre-concentration on chromatography paper SN - 1873-4324 PY - 2012///0711 N1 - Publication Type: Journal Article UR - https://doi.org/10.1016/j.aca.2012.02.014 ER -