“Spectrophotometric Assay of Piperazine Hexahydrate in Pharmaceutical Formulation With 3,5- Dinitrosalysilic Acid Reagent”. Journal of Education and Science 29, no. 3 (September 1, 2020): 46–57. Accessed August 24, 2026. https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42173.