Isolation and characterization of chitin from bumblebee (Bombus terrestris)

Insect chitin possessing shell-like structure was prepared from the bumblebee corpses by a consequent treatment with 1 M HCl and 1 M NaOH. The bumblebee chitin was compared with crustacean (shrimp) chitin by using elemental analysis, Fourier-transform infrared (FT-IR) and solid-state 13C cross-polarization magic angle spinning nuclear magnetic resonance (CP/MAS)-NMR spectroscopy and confocal microscopy. Both chitins (bumblebee and shrimp) exhibited identical spectra, while the bumblebee chitin had a 5% lower degree of acetylation and was characterized by a fine membrane texture.