Development of a sensitive and rapid method for rifampicin impurity analysis using supercritical fluid chromatography

J Pharm Biomed Anal. 2015 Oct 10:114:341-7. doi: 10.1016/j.jpba.2015.06.012. Epub 2015 Jun 15.

Abstract

A novel simple, fast and efficient supercritical fluid chromatography (SFC) method was developed and compared with RPLC method for the separation and determination of impurities in rifampicin. The separation was performed using a packed diol column and a mobile phase B (modifier) consisting of methanol with 0.1% ammonium formate (w/v) and 2% water (v/v). Overall satisfactory resolutions and peak shapes for rifampicin quinone (RQ), rifampicin (RF), rifamycin SV (RSV), rifampicin N-oxide (RNO) and 3-formylrifamycinSV (3-FR) were obtained by optimization of the chromatography system. With gradient elution of mobile phase, all of the impurities and the active were separated within 4 min. Taking full advantage of features of SFC (such as particular selectivity, non-sloping baseline in gradient elution, and without injection solvent effects), the method was successfully used for determination of impurities in rifampicin, with more impurity peaks detected, better resolution achieved and much less analysis time needed compared with conventional reversed-phase liquid chromatography (RPLC) methods.

Keywords: Impurity analysis; Rifampicin; Supercritical fluid chromatography.

MeSH terms

  • Chromatography, High Pressure Liquid / methods*
  • Chromatography, Reverse-Phase / methods*
  • Chromatography, Supercritical Fluid / methods*
  • Drug Contamination*
  • Reproducibility of Results
  • Rifampin / analogs & derivatives
  • Rifampin / analysis*
  • Rifamycins / analysis
  • Solvents
  • Temperature

Substances

  • Rifamycins
  • Solvents
  • 3-formylrifamycin SV
  • dehydrorifampicin
  • rifampicin N-oxide
  • rifamycin SV
  • Rifampin