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J. Braz. Chem. Soc. vol.24 número3

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Table 1. Qualitative composition of adulterants detected in seized cocaine  samples
Figure 3. ATR-FTIR spectra of the standards of (a) cocaine base and (b) cocaine hydrochloride.
Figure 4. ATR-FTIR spectra of the standards of four adulterant substances identified in the cocaine seized samples: (a) lidocaine hydrochloride, (b) caffeine,  (c) benzocaine and (d) boric acid.
Figure 6. Loadings of the PCA model: (a) loadings of PC1 vs. wavenumber and (b) loadings of PC2 vs
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