Fig. 4. FTIR spectrum of (A) pure hexaconazole, (B) pure dazomet, (C) chitosan, and chitosan–hexaconazole–dazomet nanoparticles prepared at various concentrations of TPP (D) 2.5 mg mL⁻¹, (E) 5 mg mL⁻¹, (F) 10 mg mL⁻¹ and (G) 20 mg mL⁻¹.