Mehmet GÜMÜŞTAŞ, Bengi USLU, Cem ERKMEN, Sibel AYŞIL ÖZKAN

Step-by-step optimization of the HILIC method for simultaneous determination of abacavir, lamivudine, and zidovudine from dosage form

Combined therapy for HIV treatment shows superior efficacy in comparison to single therapy. Furthermore,the separation and determination of the combined dosage forms hold a significant place in the pharmaceutical industry.Not only reverse phase high-performance liquid chromatography (HPLC) but also hydrophilic interaction liquid chromatography (HILIC) can be used for these purposes. Contrary to conventional RP systems, HILIC may be an alternativefor the analysis of polar substances. The aim of this study was the step-by-step development of a simple, rapid, andreliable method for the simultaneous determination of antiviral compounds from their marketed formulation (Trizivir).In order to achieve this goal, various mobile phase systems, buffer types, and concentrations were prepared to provide anappropriate separation. Different types of columns were tested to find the best resolution and high efficiency for the studied compounds. The proposed method provided a simple procedure for the simultaneous analysis of abacavir, lamivudine,and zidovudine in their pharmaceutical preparation within approximately 2 min using the conventional HPLC system.The developed method was fully validated according to the International Council for Harmonisation guidelines from theviewpoint of selectivity, sensitivity, precision, accuracy, linearity, limit of detection, and quantification.

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