%0 Journal Article %A José R Chirinos %A Dayana D Oropeza %A Jhanis J Gonzalez %A María Ranaudo %A Richard E Russo %B Energy & Fuels %D 2013 %G eng %N 5 %P 2431-2436 %R 10.1021/ef3020052 %T Determination of Vanadium/Nickel Proportionality in the Asphaltene Fraction of Crude Oil Using Thin-Layer Chromatography with Femtosecond Laser Ablation–Inductively Coupled Plasma–Mass Spectrometry %V 27 %8 05/2013