Author(s): Chitturi SR, Bharathi Ch, Reddy AV, Reddy KC, Sharma HK,
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Abstract Several related substances (RS4-RS10) were detected in lopinavir drug substance at levels ranging from 0.03\% to 0.1\% by employing gradient RP-HPLC. The related substances were identified by LC-MS analysis. These related substances were isolated and characterized by Mass, (1)H NMR and FT-IR spectral data. The separation was achieved on a YMC Pack ODS-AQ (250 mm x 4.6 mm, 5 microm) column thermostated at 45 degrees C using 0.02 M KH(2)PO(4) (pH 2.5): acetonitrile as a mobile phase in gradient elution mode. A PDA detector set at 210 nm was used for detection. The investigated validation elements showed the method has acceptable specificity, accuracy, linearity, precision, robustness and high sensitivity with detection limits and quantitation limits ranging from 0.028 microg/ml to 0.063 microg/ml and 0.084 microg/ml to 0.192 microg/ml respectively. The method can be used for routine quality control analysis and stability testing of lopinavir drug substance.
This article was published in J Pharm Biomed Anal
and referenced in Journal of Chromatography & Separation Techniques