FTIR spectra in the region of 1800–600 cm⁻¹ of hydrated films (pH 6) for free chitosan (60 µM) and its endoxifen complexes for (A) chitosan-15 KD, (B) chitosan-100 KD and (C) chitosan-200 KD with difference spectra (diff.) (bottom two curves) obtained at different drug concentrations (indicated on the figure).

<p>FTIR spectra in the region of 1800–600 cm⁻¹ of hydrated films (pH 6) for free chitosan (60 µM) and its endoxifen complexes for (A) chitosan-15 KD, (B) chitosan-100 KD and (C) chitosan-200 KD with difference spectra (diff.) (bottom two curves) obtained at different drug concentrations (indicated on the figure).