Determination of Zinc Content in Commercial Toothpaste Samples in Nigeria by Atomic Absorption Spectrophotometric Method. Pakistan Journal of Analytical & Environmental Chemistry, Pakistan, v. 22, n. 1, p. 159–164, 2021. DOI: 10.21743/pjaec/2021.06.16. Disponível em: https://pjaec.pk/index.php/pjaec/article/view/78. Acesso em: 18 nov. 2025.