Study Analytical of The Effect Magnesium ion Concentration to Determination the Total Hardness And Comparison Spectrophotometry. Baghdad Science Journal, Iraq, Baghdad, v. 10, n. 3, p. 892–897, 2013. DOI: 10.21123/bsj.2013.10.3.892-897. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2598.. Acesso em: 23 nov. 2024.