Najlaa Abd AL Salam Ahmed and Ali Ibraheem Khaleel (2018) “Spectrophotometric Determination of Sulphadiazine Using 2,4 –dinitrophenylhydrazine as Coupling Reagent”, Tikrit Journal of Pure Science, 23(8), pp. 77–82. doi: 10.25130/tjps.v23i8.546.