Separation of Oxytetracycline and Chlortetracycline in Mixed-Mode

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Chromatogram

Description

Oxytetracycline and chlortetracycline are polar compounds related to broad-spectrum of tetracycline group of antibiotics. Slight hydrophobicity and presence of the basic group in both compounds allow to employ mixed-mode reversed-phase cation-exchange mechanism for separation of these compounds. Method can be used for analysis of antibiotics and related impurities with LC/MS compatible conditions.

Method Parameters

Mobile PhaseMeCN/H2O
BufferH2SO4
Flow Rate1.0 ml/min
DetectionUV, 250 nm
Class of CompoundsDrug, Acid, Hydrophilic, Ionizable
Analyzing CompoundsOxytetracycline, Chlortetracycline

HPLC Column Used

Primesep 100, 4.6×150 mm, 3 µm, 100A