等离子体活化水对鲜切菠萝品质的影响  

Effects of Plasma-activated Water on Quality of Fresh-cut Pineapples

作　　者：陈玥 杨同亮 孟琬星 李书红[1] 陈野[1] CHEN Yue;YANG Tong-liang;MENG Wan-xing;LI Shu-hong;CHEN Ye(College of Food Science and Engineering,Tianjin University of Science&Technology,Tianjin 300457,China)

机构地区：[1]天津科技大学食品科学与工程学院,天津300457

出　　处：《食品研究与开发》2021年第3期105-110,共6页Food Research and Development

摘　　要：鲜切菠萝极易被腐败菌污染,造成品质下降,货架期缩短。为在不引起鲜切菠萝品质劣变的前提下,有效杀灭腐败菌,延长货架期,该研究首先采用大气压低温等离子体处理蒸馏水得到等离子体活化水(plasma-activated water,PAW),再利用PAW对鲜切菠萝进行清洗,分别考察PAW的制备时间、制备功率以及清洗时间对鲜切菠萝菌落数的影响。通过正交试验确定最适杀菌工艺参数为:PAW制备时间4 min、制备功率70 W以及清洗时间20 min,鲜切菠萝的菌落数从3.035 lg(CFU/g)降低到2.604 lg(CFU/g)。随后测定PAW处理后鲜切菠萝的色度、硬度、感官品质、pH值、维生素C含量以及货架期。品质分析结果表明,PAW可以保持鲜切菠萝原有品质,同时也有效减少初始带菌量;货架期研究结果表明,在4℃贮藏温度下,PAW处理使鲜切菠萝的货架期从8.06 h延长至9.03 h。Fresh-cut pineapples are easy to be contaminated by spoilage bacteria,leaing to the decline in fruit quality and the reduction in shelf life.To reduce the initial colony number of fresh-cut pineapples without causing quality change,plasma-activated water(PAW)was generated by atmospheric pressure cold plasma(ACP)treatment,and its germicidal efficacy for fresh-cut pineapples were investigated.The effects of PAW preparation time,PAW preparation power and PAW washing time on colony number were researched.The optimal sterilization conditions by single factor and orthogonal test showed that PAW preparation time of 4 min,PAW preparation power of 70 W,PAW washing time of 20 min,the colony number of fresh-cut pineapples dropped from 3.035 lg(CFU/g)to 2.604 lg(CFU/g).The chrominance,firmness,sensory quality,pH value and vitamin C content of fresh-cut pineapple were measured,the results showed that PAW could effectively reduce the initial colony number of fresh-cut pineapples while maintaining its original quality.The shelf life of fresh-cut pineapples was predicted by acceleration test,results indicated that,at storage temperature of 4℃,the shelf life of fresh-cut pineapple treated by PAW was extended from 8.06 h to 9.03 h.

关 键 词：等离子体活化水 鲜切菠萝 杀菌 品质控制 货架期 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]