IDENTIFICATION OF ACTIVE INGREDIENTS AND RELATED IMPURITIES IN A COMBINED DRUG PREPARATION USING THIN LAYER CHROMATOGRAPHY METHOD

Received: 20.05.2024/ Accepted: 17.12.2024/ Published online: 30.12.2024
УДК: 615.7:615.012.1-074
DOI: 10.53511/pharmkaz.2025.39.77.030
Kainesh Zhelubayeva, Tanagul Arystanova
NJSC “Astana Medical University”, Department of Pharmaceutical Disciplines, Astana, Kazakhstan
IDENTIFICATION OF ACTIVE INGREDIENTS AND RELATED IMPURITIES IN A COMBINED
DRUG PREPARATION USING THIN LAYER CHROMATOGRAPHY METHOD
Resume. The pharmaceutical analysis of combined drugs is associated with certain difficulties associated with the
simultaneous detection of active ingredients and their related impurities in one drug. This paper presents the first developed
method for the identification of active ingredients and possible concomitant impurities in the combined antiviral drug
“Glitsavir” using thin-layer chromatography. Optimal conditions for chromatographic analysis were selected and the
validation characteristics of the method — specificity, robustness and precision – were studied. Validation characteristics
were studied on 5 series of laboratory samples of effervescent tablets. In the model mixture, the identity of glycyrrhizic acid,
ascorbic acid and acyclovir, as well as a related impurity of acyclovir – (2-[(2-amino-6-oxo-1,6-dihydro-9H-purin-9-yl)
methoxy] ethyl acetate) was confirmed.
Keywords: combined drug, glycyrrhizic acid, acyclovir, ascorbic acid, thin layer chromatography

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