Direct and Derivative Spectrometric Determination of Zn(II) In Natural Water Sample Blood Serum and Milk: A Simple and Sensitive Spectrophotometric Method for Zinc Determination in Biological and Environmental Samples. Journal of Advances and Scholarly Researches in Allied Education, [S. l.], v. 15, n. 12, p. 195–199, 2018. Disponível em: https://ignited.in/index.php/jasrae/article/view/9220. Acesso em: 12 jan. 2026.