Study Analytical of The Effect Magnesium ion Concentration to Determination the Total Hardness And Comparison Spectrophotometry. Baghdad Sci.J [Internet]. 2013 Sep. 1 [cited 2024 Nov. 23];10(3):892-7. Available from: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/2598