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. JASRAE [Internet]. 2018 Dec. 1 [cited 2025 Jun. 27];15(12):195-9. Available from: https://ignited.in/index.php/jasrae/article/view/9220