超声波改性膨润土涂膜在芒果采后保鲜中的应用  

Application of bentonite coating modified with ultrasonic in postharvest preservation of mango

作　　者：陈勇 

机构地区：[1]广西科技大学鹿山学院食品与化学工程系,广西柳州545000 [2]广西科技大学职业技术教育学院,广西柳州545000

出　　处：《食品工业科技》2017年第24期287-291,共5页Science and Technology of Food Industry

基　　金：广西科技大学科学基金资助项目(校科自174504)

摘　　要：以广西宁明县的钙基膨润土为原材料,研究对芒果的保鲜效果。将膨润土与蒸馏水以质量比为1∶15的比例混合制得膨润土保鲜液,并利用超声仪以600 W的超声功率对保鲜液处理75 min,制得超声改性膨润土保鲜液,将保鲜液涂膜于芒果表面,置于常温下贮藏,并测定芒果各项生理指标。结果表明,相比之下,经超声波改性后的膨润土保鲜液具有更好的保鲜效果,在贮藏第12 d时,果皮转黄指数、腐烂指数及其失重率分别为48.9%、15.36%和22.7%,效果良好;同时能明显降低芒果的呼吸强度,延缓呼吸高峰,使得芒果的呼吸高峰出现在贮藏第12 d;降低了可滴定酸和维生素C的降解速度以及可溶性糖的积累速度,保鲜后的果肉风味良好,重金属含量符合国家标准。The Ca-bentonite clay produced in Ningming county of Guangxi was used as a raw material to make a preservative liquid by mixing with distilled water in a ratio of 1： 15.The bentonite preservation liquid was prepared using the ultrasonic instrument to treat for 75 min at 600 W ultrasonic power. Two kinds of preservation liquid were coated respectively on the surfaces of mangos, the experimental mangoes were stored at room temperature by measuring various physiological parameters to study preservation effect.The results showed ultrasonic modified bentonite preservation liquid had a better preservation effect,it had a good performance in the inhibition of peel turning yellow, flesh decay and quality loss. At the same time, it could significantly reduce the respiration of the mango, the degradation rates of titratable acid and vitamin C and the accumulation rate of soluble sugar.The flesh of treated mango had a good taste and their heavy metal content was within the limit of the national standards.

关 键 词：钙基膨润土 超声波 涂膜 芒果 保鲜 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]