气体比例对气调包装罗非鱼片货架期的影响研究  

Effects of gas ratio on shelf-life of tilapia fillets with modified atmosphere packaging

作　　者：彭城宇[1,2] 岑剑伟[2] 李来好[2] 杨贤庆[2] 马海霞[2] 刁石强[2] 吴燕燕[2] 

机构地区：[1]中国海洋大学食品科学与工程学院,山东青岛266003 [2]中国水产科学研究院南海水产研究所,广东广州510300

出　　处：《南方水产》2009年第6期1-7,共7页South China Fisheries Science

基　　金：农业部"948"项目(2006-G40);农业部2007年公益性行业(农业)科研专项(3-49);国家农业产业技术体系项目(nycytx-48);广东省农业重点项目(2008A020100006;2009B020201003);广东省海洋渔业科技推广项目(A200899B02)

摘　　要：研究了气调包装中CO2浓度对罗非鱼片产品货架期的影响。分别采用100%CO2(Ⅰ)、70%CO2/30%N2(Ⅱ)、50%CO2/50%N2(Ⅲ)和30%CO2/70%N2(Ⅳ)的气体比例作为变量,主要通过感官评分并结合液汁流失率与色差值、微生物数量和总挥发性盐基氮(TVB-N)3个关键指标分别评定罗非鱼片的货架期。试验结果表明,4种不同气体比例气调包装感官评定的货架期分别为19、22、17和13d,4组样品货架期差异均明显(P<0.05);微生物指标评定的货架期分别为26、25、20和15d,Ⅰ和Ⅱ组差异不明显(P>0.05),但相对Ⅲ和Ⅳ组差异明显(P<0.05);TVB-N评定的货架期分别为25、23、18和13d,4组样品货架期差异均明显(P<0.05)。但高浓度的CO2会加速液汁的渗出,因此,使用70%CO2的气调包装能够更好地延长货架期与保持产品良好外观。Tilapia fillets packaged in controlled atmosphere with 100% CO2 （ Ⅰ ）, 70% CO2/30% N2 （ Ⅱ ）, 50% CO2/50% N2 （ Ⅲ ） and 30% CO2/70% N2 （ Ⅳ ） were stored respectively at - 0.7 ＋ 0. 3 ℃. The shelf-life of tilapia fillets was evaluated by the sensory evaluation as well as key indexes such as drip loss and chromatic aberration, microbial changes, and TVB-N. The results showed that the shelf-life evaluated by sensory evaluation parameter was 19, 22, 17 and 13 d respectively, and the difference was significant （P 〈0. 05 ） ; the shelf-life evaluated by microbial parameter was 26, 25, 20 and 15 d respectively. There was no significant difference between Ⅰ and H （ P 〉 0. 05 ）, but compared with m and Ⅳ the difference was significant （ P 〈 0. 05 ） ; the shelf-life evaluated by TVB-N parameter was 25, 23, 18 and 13 d respectively, and the difference was significant （P 〈0. 05）. However, the drip loss of tilapia fillets was positively related to CO2 concentration. In conclusion, the modified atmosphere at the level of 70% CO2/30% N2 was most suitable, which could extend the shelf-life of tilapia fillets effectively as well as keep their good appearance.

关 键 词：罗非鱼片 气调包装 CO2浓度 货架期 

分 类 号：S644.109.3[农业科学—蔬菜学] TS206[农业科学—园艺学]