壳聚糖结合山梨酸钾涂膜对葡萄的保鲜效果  

Effect of Chitosan and Potassium Sorbate Composite Coating on Preservation Quality of Grape

作　　者：石飞 黑鸿爱 刘晋利 王君[1] SHI Fei;HEI Hong′ai;LIU Jinli;WANG Jun(College of Food Science and Engineering,Shanxi Agricultural University,Jinzhong 030801,Shanxi,China)

机构地区：[1]山西农业大学食品科学与工程学院,山西晋中030801

出　　处：《食品研究与开发》2024年第17期8-13,共6页Food Research and Development

基　　金：山西农业大学科技创新基金项目(2018YJ01)。

摘　　要：以鲜玫瑰香葡萄为原料,探讨壳聚糖与不同浓度的山梨酸钾复合涂膜处理对其贮藏品质的影响。采用1%壳聚糖溶液分别与0.2%、0.3%和0.4%山梨酸钾溶液复配制成复合膜处理葡萄果实,定期测定其生理生化指标(腐烂率、落粒率、失重率、硬度、可溶性固形物含量、可滴定酸含量、相对电导率、丙二醛、过氧化物酶)。结果表明:单独壳聚糖涂膜及其与0.2%或0.3%山梨酸钾复合涂膜均可明显降低玫瑰香葡萄在贮藏期间的腐烂率和落粒率,在贮藏后期明显降低果实质量损失,保持果实硬度,抑制果实中相对电导率的增加和丙二醛的积累以及过氧化物酶活性的升高,保持果实品质,其中1%壳聚糖与0.3%山梨酸钾复合涂膜处理效果较好。The effects of chitosan and different concentrations of potassium sorbate composite coating on its storage quality were discussed,with the fresh muscat grape as raw material.The muscat grape fruits were treated with composite coating prepared by compounding 1%chitosan solution with 0.2%,0.3%,and 0.4%potassium sorbate solution respectively to regularly determine the physiological and biochemical indexes(decay rate,abscission rate,weight loss,hardness,soluble solids,titratable acid,relative conductivity,malondialdehyde,and peroxidase).The results showed that single chitosan coating and its composite coating with 0.2%or 0.3%potassium sorbate could obviously reduce the decay rate and abscission rate of the grape during storage,significantly decrease the fruit quality loss at later storage period,keep the fruit hardness,and inhibit the increase of relative conductivity,the accumulation of malondialdehyde and the increase of peroxidase activity,thus maintaining the fruit quality.The effect of 1%chitosan and 0.3%potassium sorbate composite coating was better.

关 键 词：壳聚糖 山梨酸钾 复合涂膜 玫瑰香葡萄 贮藏品质 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]