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Reversed-phase HPLC separation of Δ;2 and Δ;3 isomers of 7-ADCA and cephalexin monohydrate

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Summary

High-performance liquid chromatography was applied for the separation and determination of the Δ2 and Δ3 isomers of 7-aminodeacetoxycephalosporanic acid (7·ADCA) and cephalexin monohydrate in their mixtures. Separation was performed on a column containing bonded octadecyl silica phase. The effects of pH (in the range of 3.0–7.6) on the investigated compounds were studied. Two organic modifiers, acetonitrile and methanol, were used to improve and accelerate separation.

The applied procedure was very reliable for quantitative determination. Excellent correlation with the data of microbiological assay was found. The procedure was very convenient even when other impurities were present in the sample. This is an advantage with respect to microbiological assays.

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Authors and Affiliations

  1. Pliva Pharmaceutical, Chemical, Food and Cosmetic Industry Research Institute, 41000, Zagreb, Croatia, Yugoslavia

    N. Kovačić-Bošnjak, Z. Mandić & M. Kovačević

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  1. N. Kovačić-Bošnjak
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  2. Z. Mandić
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  3. M. Kovačević
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Kovačić-Bošnjak, N., Mandić, Z. & Kovačević, M. Reversed-phase HPLC separation of Δ;2 and Δ;3 isomers of 7-ADCA and cephalexin monohydrate. Chromatographia 23, 350–354 (1987). https://doi.org/10.1007/BF02316181

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  • DOI: https://doi.org/10.1007/BF02316181

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