Figure 3.

FTIR spectra of PLGA, CS, DS, DS-PLGA, and CS-DS-PLGA. The major peaks for all nanoparticles samples is measured at 1175 cm⁻¹ and 1760 cm⁻¹ which corresponds to the standard basic measurement of PLGA absorption band. Characteristic absorption peak of chitosan at 1545 cm⁻¹ and 1630 cm⁻¹ and that of drug at 768 cm⁻¹ confirms their presence in respective nanoparticles.