Khalil E, Sultan S. Spectrophotometric Determination of hiamin Hydrochloride in Pharmaceutical Preparations by Azo-Coupling Reactions with Sulphacetamide Sodium Reagent. JWUPS [Internet]. 2025 Jul. 19 [cited 2025 Aug. 3];1(2). Available from: https://rjps.uomosul.edu.iq/index.php/jwups/article/view/21900