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Abata, E.O., Ogunkalu, O.D., Adeoba, A.A. and Oluwasina, O.O. 2019. Evaluation of the Heavy Metals in Tonic Creams using the Wet Acid and Dry Ashing Methods . Earthline Journal of Chemical Sciences. 1, 1 (Jan. 2019), 37-43. DOI:https://doi.org/10.34198/ejcs.1119.3743.