Simultaneous Determination of Cephalexin and Cefixime by First and Second Derivative Ultraviolet Spectrophotometry. cbej [Internet]. 2022 Dec. 17 [cited 2024 Jul. 22];22(93):89-100. Available from: https://cbej.uomustansiriyah.edu.iq/index.php/cbej/article/view/7852