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Determination of impurities in an acidic drug substance by micellar electrokinetic chromatography

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Summary

A sensitive micellar electrokinetic chromatography method for the determination of impurities in SB-209247, a novel LTB4 antagonist, has been developed. Selectivity was optimised by systematic examination of the effects of the acetonitrile content in the separation buffer. Sensitivity and resolution was enhanced by focusing effects for both charged and neutral analytes achieved by a special sample buffer composition. Minor impurities well below 0.1% peak area ratio can be readily and reliably detected. The validity of the method has been successfully demonstrated with respect to reproducibility of peak area ratios and the linearity of a key impurity. A comparison with HPLC has shown the method has complementary selectivity and competitive sensitivity.

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Authors and Affiliations

  1. Smith Kline Beecham Pharmaceuticals, Analytical Sciences, Old Powder Mills, TN11 9AN, Tonbridge, Kent, UK

    M. Gilges

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  1. M. Gilges
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Gilges, M. Determination of impurities in an acidic drug substance by micellar electrokinetic chromatography. Chromatographia 44, 191–196 (1997). https://doi.org/10.1007/BF02466455

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  • DOI: https://doi.org/10.1007/BF02466455

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