壳聚糖双胍盐酸盐涂膜保鲜砂糖橘及其抑菌作用的研究

傅夏兵; 陈佳阳; 罗永祥; 乐学义

壳聚糖双胍盐酸盐涂膜保鲜砂糖橘及其抑菌作用的研究

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

摘要

摘要: 研究了壳聚糖双胍盐酸盐（CGH）对柑橘绿霉菌和柑橘青霉菌的抑菌能力，并通过涂膜的方法处理砂糖橘，测定了贮藏过程中果实失重率、可溶性固形物含量（TSS）、维生素C（Vc）含量及总酸含量（TA）的变化。结果表明，与壳聚糖（CTS）比较，CGH 对柑橘绿霉菌和柑橘青霉菌具有较强的抑菌能力，当CGH浓度为0.4 mg/mL和5.0mg/mL时，可分别完全抑制柑橘青霉菌和柑橘绿霉菌的生长；质量浓度为2%的CGH涂膜处理的砂糖橘在28(±2)℃下存放27d后，失重率仅为2.25%，TSS为13.7%，Vc含量为每100g砂糖橘鲜重含有15.01mg、可滴定酸含量为0.85%。与对照相比，CGH涂膜较好地保持了果实的品质。

Abstract: 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.

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