Inclusion Complex of Exocarpium Citri Crandis Essential Oil with β-Cyclodextrin: Characterization, Stability, and Antioxidant Activity

摘要

The purpose of this study was to produce and characterize an inclusion complex between beta-cyclodextrin (beta-CD) and Exocarpium Citri Grandis essential oil (EEO), and to evaluate its antioxidant properties. The volatile compounds of EEO were characterized by gas chromatography-mass spectrometer. A comparison of the beta-CD, EEO, and the physical mixture with the inclusion complex revealed differences in their thermal stabilities and morphologies, which confirmed the formation of the beta-CD-EEO inclusion complex. Complexed with beta-CD, the beta-CD-EEO inclusion complex showed a higher stability and antioxidant activity when compared with physical mixture and EEO. Therefore, beta-CD can be used to form inclusion complexes with EEO to expand its potential applications in the food and drug industries. Practical Application Exocarpium Citri Grandis is rich in essential oil and other ingredients. The optimized extraction, constituent composition, and encapsulation of EEO in beta-CD were investigated in this study. The results showed that the encapsulation process increased the antioxidant activity and stability of EEO, which provides both fundamental and practical knowledge for the application of EEO in the food and drug industries.