Abstract Products with a Protected Denomination of Origin (PDO) are vulnerable to misdescription of their true geographical origin. In this work a method has been developed that allows the authentication of La Vera paprika powder (Pimenton de la Vera), a PDO product from the central-west Spanish region, Extremadura. The mass fractions of Br, Ca, Cr, Cl, Cu, Fe, K, Mn, Ni, P, Rb, S, Sr and Zn determined by energy dispersive X-ray fluorescence (ED-XRF) are used for classification purposes by multivariate analysis using Soft Independent Modelling of Class Analogy (SIMCA) (PCA-Class) and Partial Least Square-Discriminant Analysis (PLS-DA). Sixty-seven paprika samples purchased in supermarkets around Europe and on-line via the official web-site of Pimenton de La Vera, were used to build up the models for prediction purposes. The PCA-class model of La Vera paprika powder had a sensitivity of 82%, a specificity of 100% and an accuracy of 91%, whereas the PLS-DA model had a sensitivity of 100%, a specificity of 91% and an accuracy of 96%.

中文翻译：

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通过 ED-XRF 确定的元素指纹的多变量分析对 PDO 辣椒粉 (Pimentón de la Vera) 进行鉴定。可行性研究

摘要 具有受保护原产地名称 (PDO) 的产品很容易对其真实地理来源进行错误描述。在这项工作中，开发了一种方法，可以对来自西班牙中西部地区埃斯特雷马杜拉的 PDO 产品 La Vera 辣椒粉 (Pimenton de la Vera) 进行认证。通过能量色散 X 射线荧光 (ED-XRF) 确定的 Br、Ca、Cr、Cl、Cu、Fe、K、Mn、Ni、P、Rb、S、Sr 和 Zn 的质量分数用于分类目的使用类类比软独立建模 (SIMCA) (PCA-Class) 和偏最小二乘判别分析 (PLS-DA) 进行多变量分析。在欧洲各地的超市购买并通过 Pimenton de La Vera 的官方网站在线购买的 67 份辣椒粉样品被用于建立用于预测目的的模型。