Effects of chitosan biguandine hydrochloride coating on storage quality of Citrus reticulata and its antimicrobial activities

The antimicrobial activities of chitosan biguandine hydrochloride (CGH) were investigated against Citrusgreen mold and Citrus Penicillium, respectively. Relation between variation and storage time of Citrus reticulata mass-loss ratio, total soluble solid, Vc content and soluble acid content was examined attentively after fresh-keeping process with CGH as coating film. CGH could completely inhibit the growth of Citrus Penicillium and Citrus green mold at 0.4 mg/mL and 5.0 mg/mL, respectively. CGH with concentration of 2% coating on Citrus reticulata showed a better preservation effect after 27 d storage under 28 依2益. The mass -loss, total soluble solid, Vc content and soluble acid content of Citrus Reticulata were 2.25%, 13.7%, 15.01 mg/100g, and 0.85%, respectively.