عبد الرحمن جمال حسن, أ.م.د. عمر عبد الحي شيخ احمد. Using 2,4- Dinitroaniline as a Reagent for the Spectrophotometric Determination of Vancomycin Hydrochloride by Diazotization Coupling Reaction. jhas. 2024;9(2):451-470. doi:10.58916/jhas.v9i2.274