基于矿物元素技术的中宁不同产区枸杞的判别分析

被引:14
作者
开建荣
石欣
李彩虹
杨春霞
王彩艳
机构
[1] 宁夏农产品质量标准与检测技术研究所
关键词
枸杞; 矿物元素; 线性判别分析; 正交-偏最小二乘法; 溯源;
D O I
10.13995/j.cnki.11-1802/ts.027625
中图分类号
TS207.3 [食品分析与检验];
学科分类号
100403 [营养与食品卫生学];
摘要
通过分析中宁不同产区枸杞中矿物元素含量差异,结合多元统计分析,筛选有效的溯源指标,构建枸杞原产地鉴别的判别模型。该研究采集了宁夏中宁县舟塔、鸣沙洲、红梧山、红柳沟和清水河5个小产区的111份枸杞样品,利用电感耦合等离子体质谱仪测定了43种矿物元素含量,结合方差分析、主成分分析和Fisher判别分析、正交-偏最小二乘法判别分析方法建立了枸杞产地判别模型。结果表明,枸杞样品43种矿物元素中有28种矿物元素含量在不同地域间存在显著差异。经过主成分分析,从43种矿物元素可提取出10个主成分33种矿物元素,代表了总指标76.583%的信息。通过Fisher判别分析确定了Cd、Ce、Co、Cu、Gd、Hg、Mg、Se、Zn、P等10种矿物元素为枸杞的有效溯源指标,2种判别模型的整体正确判别率分别为82.0%和91.89%,基本实现了小尺度区域内枸杞的产地判别。研究证明矿物元素产地溯源技术可用于枸杞的原产地判别。
引用
收藏
页码:253 / 260
页数:8
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