基于矿物元素含量的葡萄干产地溯源

Geographical Source Traceability of Raisins Based on Mineral Element Contents

【目的】研究中国新疆吐鲁番、和田,以及乌兹别克斯坦撒马尔罕州葡萄干的产地溯源,建立基于矿物元素含量的产地识别方法,为在中国新疆特色果品产地溯源及地理标志性农产品保护等提供参考依据。【方法】利用电感耦合等离子体质谱仪(ICP-MS)和电感耦合等离子体发射光谱仪(ICP-AES)测定了3个产区69份葡萄干样品中的50种矿物元素含量,对所得数据进行方差分析、判别分析、主成分分析和聚类分析。【结果】筛选出Li、Sc、Co、Y、Mo、Mn、Cu、Na和K共9种矿物元素指标建立葡萄干产地判别模型。使用筛选出的9个元素含量作为变量,对模型外3个产区的9个样品进行验证,判别准确率达到了100%。使用从9种矿物元素含量中提取的3个主成分对3个产地葡萄干样品进行聚类分析,聚类效果明显。【结论】利用矿物元素可对来源于3个产区的葡萄干进行有效判别。

【Objective】To trace the geographical source of raisins from Turpan and Khotan in Xinjiang of China,and Smarkand of Uzbekistan and establish the trace method base on mineral elemental contents.【Method】In this experiment,inductively coupled plasma mass spectrometry(ICP-MS)and inductively coupled plasma Atomic Emission Spectrometer(ICP-AES)were used to analyze the contents of 50 mineral elements in 69 samples collected from 3 raisin producing areas and then the obtained data were analyzed by variance analysis,discriminant analysis,principal component analysis(PCA)and cluster analysis.【Result】9 mineral elements mainly including Li,Sc,Co,Y,Mo,Mn,Cu,Na and K were selected by discriminant to establish the model for detecting geographical classification of raisin samples.The 9 selected elements were used as variables to verify 9 samples from 3 raisin regions outside the model,and the discrimination accuracy reached 100%.The obviously clustering effect was obtained from cluster analysis by the 3 main component extracted from 9 mineral elements of 3 raisin producing areas.【Conclusion】The model based on mineral element analysis can be used successfully to discriminate raisins from 3 raisin producing area.This model may provide a reference in geographical origin tracing of Xinjiang characteristic fruits and in protection of geographical landmark agricultural products.