Simultaneous Determination of Paracetamol and Hyoscine-N- Butyl Bromide in Binary Mixture Using Derivative Spectrophotometry and Their Application for Pharmaceutical Samples. ANJS [Internet]. 2018 May 31 [cited 2024 Nov. 25];19(1):56-68. Available from: https://mail.anjs.edu.iq/index.php/anjs/article/view/254