Asmaa O. El Demerdash

Densitometric and UV-Spectrophotometric Methods for Simultaneous Determination of Spiramycin adipate in Binary Mixture with Oxytetracycline-HCl or Tetracycline-HCl

Asmaa O. El Demerdash, Sawsan A. Abdel Razeq, Manal M. Fouad & Hoda F. El Sanabary · International Research Journal of Pure and Applied Chemistry · 2018

Five methods were developed for simultaneous determination of spiramycin adipate and oxytetracycline-HCl and/or tetracycline-HCl in their pharmaceutical formulations. The first one was a densitometric evaluation of thin-layer chromatograms using a mobile phase of methanol: Butano...

Open access Research Article 10.9734/IRJPAC/2018/44345

Stability-indicating Methods for the Determination of Closantel Sodium by HPLC, Densitometry, Spectrofluorimetry and pH Induced ∆A

Sawsan A. Abdel Razeq, Asmaa O. El Demerdash & Hoda F. El Sanabary · Chemical Science International Journal · 2014

Four stability-indicating methods were developed for the determination of closantel-Na in the presence of its alkaline degradation products. The first one was HPLC method in which efficient separation was achieved on a C18 analytical column with isocratic elution and a mobile pha...

Open access Research Article 10.9734/ACSJ/2015/13090