Separation and characterization of clindamycin and related impurities in bulk drug by high-performance liquid chromatography-electrospray tandem mass spectrometry

Journal of Pharmaceutical and Biomedical Analysis
Hui ZhouYuanjiang Pan

Abstract

A simple high-performance liquid-electrospray ionization tandem mass spectrometric (HPLC-ESI-MSn) method has been developed for the rapid identification of clindamycin and its related minor impurities in bulk drug. The ESI-MSn results obtained allowed us to propose plausible schemes for their fragmentations, which were confirmed further by electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI-FTICR-MS) using collision-induced dissociation (CID) method at high mass resolution. The positive ESI-MS/MS of clindamycin and its derivative compounds showed some diagnostic fragments, such as the neutral losses of H2O, HCl, methanethiol and 2-methylthio-ethenol, and the residue of 3-propyl-N-methylpyrrolidine and 3-ethyl-N-methylpyrrolidine, which are specific and useful for the identification of the lincosamide antibiotics and related impurities. According to the fragmentation mechanism of mass spectrometry and HPLC-UV-ESI-MSn data, six impurities of clindamycin have been identified on-line. Additionally, the positive ion mode extracted ion current (EIC) method has been used to separate and identify these lincosamide compounds.

References

Jul 1, 1970·Journal of Medicinal Chemistry·R D Birkenmeyer, F Kagan
Jan 1, 1970·Journal of Pharmaceutical Sciences·T O Oesterling
Apr 29, 1999·Journal of Chromatography. B, Biomedical Sciences and Applications·H Fieger-BüschgesH Blume

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