不同部位矿质元素与红外光谱数据融合对美味牛肝菌产地溯源研究

被引:13
作者
张钰 [1 ,2 ]
李杰庆 [1 ]
李涛 [3 ]
刘鸿高 [1 ]
王元忠 [2 ]
机构
[1] 云南农业大学农学与生物技术学院
[2] 云南省农业科学院药用植物研究所
[3] 玉溪师范学院资源环境学院
关键词
产地溯源; 美味牛肝菌; 矿质元素; FTIR; 不同部位; 数据融合;
D O I
暂无
中图分类号
O657.33 [红外光谱分析法]; TS219 [其他食品制造];
学科分类号
070302 [分析化学]; 100403 [营养与食品卫生学];
摘要
野生食用菌产地溯源研究中,采用单一有机成分或矿质元素指纹存在一定局限性。利用不同指纹分析技术的互补性与协同性,将不同部位与类型的化学信息进行融合,探讨此方法对野生食用菌产地溯源的可行性,以期为野生食用菌溯源提供新的思路与科学依据。通过测定云南7个产地、124个美味牛肝菌(菌柄、菌盖)中15种矿质元素的含量,以及子实体傅里叶变换红外光谱(FTIR)。标准正态变换(SNV)、二阶导数(2D)等算法对原始光谱进行预处理。基于低级与中级数据融合策略,将预处理后的FTIR光谱与菌柄、菌盖矿质元素数据进行融合,结合支持向量机(SVM)分别建立菌柄、菌盖、FTIR、低级数据融合(菌柄+菌盖,菌柄+菌盖+FTIR)与中级数据融合(菌柄+菌盖+FTIR)判别模型;分析比较模型参数,确定快速甄别美味牛肝菌产地的可靠方法。结果显示:(1)菌盖中Cd,Cr,Cu,Li,Mg,Na,P和Zn元素平均含量高于菌柄,Ba,Ca,Co,Ni,Rb,Sr和V元素在菌柄中平均含量高于菌盖。美味牛肝菌中人体必需矿质元素Ca,Cu,Mg,P和Zn平均含量远高于小麦、水稻干品和新鲜蔬菜,与动物干制品含量相似;(2)FTIR光谱数据最佳预处理方法为3D+SNV,其Q2和R2 Y分别为76.64%,88.91%;(3)菌柄、菌盖、FTIR、低级数据融合与中级数据融合SVM模型,c值分别为8 192,4 096,1.414 2,11.313 7,1和0.7071 1,菌柄和菌盖模型c值较大,表明采用单一菌柄或菌盖矿质元素含量数据,SVM训练存在过拟合风险,判别效果较差;(4)FTIR、低级数据融合和中级数据融合SVM模型,样品分类错误总数分别为7,9,7和0,中级数据融合(菌柄+菌盖+FTIR)模型样品分类正确率最高。表明基于中级融合策略将不同部位矿物元素和子实体FTIR光谱数据融合,可作为野生食用菌产地溯源的一种有效方法。
引用
收藏
页码:3070 / 3076
页数:7
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