利用低场核磁共振检测分析注水猪肉水分子弛豫特性  

Analysis of water relaxation characteristics of water-injected pork by low-field nuclear magnetic resonance

作　　者：盖圣美[1,2] 张中会[1] 邹玉峰[2] 宋迪[1] 魏法山 刘登勇[1] GAI Sheng-Mei ZHANG Zhong-Hui ZOU Yu-Feng SONG Di WEI Fa-Shan LIU Deng-Yong(College of Food Science and Technology, Bohai University, Food Safety Key Laboratory of Liaoning Province, National ＆ Local Joint Engineering Research Centre of Storage, Processing and Safety Control Technology for Fresh Agricultural and Aquatic Products, Jinzhou 121013, China Henan Province Product Quality Supervision and Inspection Center, Zhengzhou 450004, China National Center of Meat Quality and Safety Control, Nanjing Agricultural University, Nanjing 210095, China)

机构地区：[1]渤海大学食品科学与工程学院辽宁省食品安全重点实验室生鲜农产品贮藏加工及安全控制技术国家地方联合工程研究中心,锦州121013 [2]南京农业大学国家肉品质量安全控制工程技术研究中心,南京210095 [3]河南省产品质量监督检验院,郑州450004

出　　处：《食品安全质量检测学报》2017年第6期1980-1986,共7页Journal of Food Safety and Quality

基　　金：国家自然科学基金项目(31501410);国家重大科学仪器设备开发专项(2013YQ17046308)~~

摘　　要：目的运用低场核磁共振(low-field nuclear magnetic resonance,LF-NMR)技术分析样品检测质量及注水比例对水分子弛豫特性的影响。方法分析不同样品质量(1、2、3、4、5 g)对弛豫时间、峰总面积、峰面积比的影响,确定最佳样品质量;通过测定不同注水比例(0%、10%、20%、30%、40%、50%)对猪肉弛豫特性的影响,分析注水后猪肉中的水分变化。结果样品质量为3 g时,弛豫时间、峰面积比的稳定性较好;随着注水比例的增加,不易流动水的起峰时间显著增加(P<0.05)、峰面积比显著减小(P<0.05);而自由水的起峰时间、峰顶点时间、峰面积比均显著增大(P<0.05)。结论在样品质量为3 g的条件下采样,有利于获得较为稳定的试验结果;将不易流动水和自由水的变化规律应用在注水肉检测方面,可使注水肉的检测更加方便、快捷。Objective To analyze the effects of sample weight and water-injected ratios on the relaxation characteristics of pork by low-field nuclear magnetic resonance （LF-NMR）. Methods The optimum sample weight was determined based on the relaxation time, peak area and peak area ratio at different sample weights （1, 2, 3, 4, 5 g） Relaxation characteristics of pork at different ratios （0%, 10%, 20%, 30%, 40%, 50%） of water-injected were measured to explore the moisture changes of water-injected meat. Results The results of relaxation time and peakarea ratio showed a good stability when sample weight was 3 g. With the increase of the ratios of water injection, the value of T21 increased （P〈0.05）, while P21 showed a decrease （P〈0.05）. In addition, the relaxation time and peak area ratio of free water increased significantly （P〈0.05） when the samples were injected more water. Conelusion The results are more stable when sample weight is 3 g. Changes of immobilized water and free water by LF-NMR can be applied to detect the quality of pork, which will shorten the detection time and improve the accuracy of the test.

关 键 词：注水肉 弛豫 水分 

分 类 号：O657.2[理学—分析化学] TS251.51[理学—化学]