Characterization of genuine and fake artesunate anti-malarial tablets using Fourier transform infrared imaging and spatially offset Raman spectroscopy through blister packs

Anal Bioanal Chem. 2007 Nov;389(5):1525-32. doi: 10.1007/s00216-007-1543-1. Epub 2007 Sep 19.

Abstract

In support of the efforts to combat the illegal sale and distribution of counterfeit anti-malarial drugs, we evaluated a new analytical approach for the characterization and fast screening of fake and genuine artesunate tablets using a combination of Raman spectroscopy, Spatially Offset Raman Spectroscopy (SORS) and Attenuated Total Reflection-Fourier Transform Infrared (ATR-FTIR) imaging. Vibrational spectroscopy provided chemically specific information on the composition of the tablets; the complementary nature of Raman scattering and FTIR imaging allowed the characterization of both the overall and surface composition of the tablets. The depth-resolving power of the SORS approach provided chemically specific information on the overall composition of the tablets, non-invasively, through a variety of packaging types. Spatial imaging of the tablet surface (using ATR-FTIR) identified the location of domains of excipients and active ingredients with high sensitivity and enhanced spatial resolution. The advantages provided by a combination of SORS and ATR-FTIR imaging in this context confirm its potential for inclusion in the analytical protocol for forensic investigation of counterfeit medicines.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antimalarials / analysis
  • Artemisinins / analysis*
  • Artesunate
  • Sesquiterpenes / analysis*
  • Spectroscopy, Fourier Transform Infrared / methods*
  • Spectrum Analysis, Raman / methods*
  • Tablets / analysis*

Substances

  • Antimalarials
  • Artemisinins
  • Sesquiterpenes
  • Tablets
  • Artesunate