基于LF-NMR弛豫特性对注水、注胶羊肉辨别研究  

Study on Discrimination of Gum-injected, Water-injected Mutton Based on the LF-NMR Relaxometry Characteristics

作　　者：王胜威[1] 母应春[1,2] 赵旭[1] 杨旭卉 文飞[1] 苏伟[1,2,3] 

机构地区：[1]贵州大学酿酒与食品工程学院,贵阳550025 [2]贵州省农畜产品贮藏与加工重点实验室,贵阳550025 [3]贵州大学南区分析测试中心,贵阳550025

出　　处：《食品工业》2015年第6期184-188,共5页The Food Industry

基　　金：黔西南州种草养羊产业发展省州科技合作专项项目"晴隆生态羊肉质量安全研究及体系建设"[黔西南科号(2012)4]

摘　　要：利用低场核磁共振技术(LF-NMR)对正常羊肉及注水、注胶肉检测,根据样品的T2时间所反映的水分存在状态及分布结果,结合主成分分析法(PCA)及逐步线性判别分析(Step-LDA)对不同类的羊肉样品进行区分辨识。结果表明,基于羊肉样品的弛豫特性,结合主成分分析法,纯羊肉和注水肉在主成分得分图上可以得到很好的区分;纯羊肉及注胶肉也可以得到有效的辨识;逐步线性判别分析的区分情况更为显著,同时样品随着掺加比例的变化在图中呈现规律性分布,交叉验证中分类的正确率分别达到了100%,72%和100%。说明判别模型的辨识能力较佳,低场核磁共振技术结合适当的数据算法在羊肉质量控制及评价中具有较大的应用潜力。Low-field NMR techniques was used to detect gum-injected and water-injected mutton,and combined with principal component analysis（PCA） and Step Linear Discriminant Analysis（Step-LDA） for analysis of data.According to the presence and distribution of water by the time T_2,water-injected mutton was rapid discriminated.The results showed that pure mutton and water-injected mutton could be distinguished on the principal component score chart;pure mutton and gum-injected mutton could be effectively identified;the distinction of Step-LDA was more significant than PCA.Meanwhile,the samples presented regular distribution with the changing of mixing ratio.The model showed a good correlative and predictive ability with a cross-validated on the correctness rate of the classification reached 100%,72%and 100%respectively.Low-field NMR techniques combined with PCA method had great potential in mutton quality control and evaluatioa

关 键 词：注水羊肉 注胶羊肉 低场核磁共振 主成分分析法 逐步判别分析 

分 类 号：TS251.7[轻工技术与工程—农产品加工及贮藏工程]