Spectrophotometric Assay of Piperazine hexahydrate in Pharmaceutical Formulation with 3,5- Dinitrosalysilic Acid Reagent. JES [Internet]. 2020 Sep. 1 [cited 2026 Aug. 24];29(3):46-57. Available from: https://edusj.uomosul.edu.iq/index.php/edusj/article/view/42173