Romero-Estévez, D., Yánez-Jácome, G.S., Simbaña-Farinango, K., Vélez-Terreros, P.Y. and Navarrete, H. 2019. Evaluation of two sample preparation methods for the determination of cadmium, nickel and lead in natural foods by Graphite Furnace Atomic Absorption Spectrophotometry. Universitas Scientiarum. 24, 3 (Nov. 2019), 497–521. DOI:https://doi.org/10.11144/Javeriana.SC24-3.eots.