Influence of Temperature and Mobile Phase Composition on Retention Properties of the Macroline Antibiotics Clarithromicin and Roxithromcin in Reversed-phase Liquid Chromatography

A. Pappa-Louisi, P. Agrafiotou, G. Zissopoulou, P. Liatsi

Öz


The reversed-phase (RP) chromatographic behaviour of the macrolide antibiotics clarithromycin (Clari) and roxithromycin (Roxi) was extensively studied as a function of mobile phase composition - modified with one, two or three of organic solvents - and column temperature. The results of our study provide a satisfactory thermodynamic explanation for the retention processes of these macrolides in RP-HPLC and give additional information on the selection of optimal separation conditions for the determination of Clari in human plasma using Roxi as an internal standard and vice versa.


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