草鱼贮藏过程中导电特性变化规律的研究  

Study on the variation of electrical conductivity properties of grass carp (Ctenopharyngodon idellus) during storage

作　　者：张丽娜[1] 沈慧星[2] 罗永康[1] 

机构地区：[1]中国农业大学食品科学与营养工程学院,北京100083 [2]中国农业大学理学院,北京100083

出　　处：《淡水渔业》2010年第5期59-62,67,共5页Freshwater Fisheries

基　　金：现代农业产业技术体系建设专项资金资助(nycytx-49)

摘　　要：运用物理特性-伏安法测定了不同频率下冰鲜和解冻草鱼的阻抗,分析在不同贮藏时间下阻抗的相对变化值(Q值)的变化特点。结果显示:从1 kHz增大到10 kHz,冰鲜和解冻草鱼的阻抗均随着频率的增大而减小,冰鲜草鱼的阻抗相对变化值(Q值)明显大于解冻草鱼。冰鲜草鱼在第1、2、4、7、10天的阻抗相对变化Q值分别为:28.89%、25.10%、17.01%、11.65%、10.37%,而冷冻7、14、30 d后解冻草鱼的最大Q值分别为4.34%、4.18%、4.63%。结果表明:以Q值10%为界限,快速鉴定冰鲜草鱼和解冻草鱼是基本可行的。The study adopted physical method voltmeter-ammeter to measure the impedance of chilled and frozen-thawed grass carp under different frequencies during storage.Although impedances of both chilled and frozen-thawed grass carp decreased as frequencies increasing from 1 kHz to 10 kHz,change ratio of impedance（Q value） of chilled samples was evidently higher than that of frozen-thawed.The Q value of chilled grass carp in the day of 1,2,4,7,10 were as follows：28.89%,25.10%,17.01%,11.65%,10.37%,while the maximum Q values of the thawing grass carp after frozen 7,10,30 days were 4.34 %,4.18%,4.63% respectively.It is feasible to identify chilled and frozen-thawed grass carp according to the change ratio of their impedance compared with limited value of 10%.

关 键 词：冰鲜草鱼(chilled Ctenopha ryngodon idellus) 解冻草鱼(frozen-thawed Ctenopha ryngodon idellus) 阻抗 阻抗相对变化值 

分 类 号：S984.1[农业科学—捕捞与储运]