Spectrophotometric Determination of Vitamin B1 (Thia Min Hydrochloride)In Pharmaceutical Preparation by Coupling Reaction With Diazotized Sulfanilic Acid. Tikrit J. Pharm. Sci. 2023, 1 (2), 1-8. https://doi.org/10.25130/tjphs.2005.2.1.1.8.