Institute of Chemistry, Universidade de Brasília, Distrito Federal, Brazil.
National Institute of Criminalistics, Brazilian Federal Police, Brazil.
Food Chem. 2017 Aug 15;229:142-151. doi: 10.1016/j.foodchem.2017.02.024. Epub 2017 Feb 8.
The discrimination of whisky brands and counterfeit identification were performed by UV-Vis spectroscopy combined with partial least squares for discriminant analysis (PLS-DA). In the proposed method all spectra were obtained with no sample preparation. The discrimination models were built with the employment of seven whisky brands: Red Label, Black Label, White Horse, Chivas Regal (12years), Ballantine's Finest, Old Parr and Natu Nobilis. The method was validated with an independent test set of authentic samples belonging to the seven selected brands and another eleven brands not included in the training samples. Furthermore, seventy-three counterfeit samples were also used to validate the method. Results showed correct classification rates for genuine and false samples over 98.6% and 93.1%, respectively, indicating that the method can be helpful for the forensic analysis of whisky samples.
利用紫外-可见光谱结合偏最小二乘判别分析（PLS-DA）对威士忌品牌进行鉴别和假冒识别。在本方法中，所有光谱均无需样品制备即可获得。鉴别模型的建立采用了七种威士忌品牌：红牌、黑牌、白马、芝华士 12 年、百龄坛特醇、老帕尔和纳图诺比利斯。该方法采用来自于七个选定品牌的真实样本和另外十一个未包含在训练样本中的品牌的独立测试集进行验证。此外，还使用了七十三份假冒样本对该方法进行验证。结果表明，对真假样本的正确分类率分别超过 98.6%和 93.1%，表明该方法可有助于威士忌样本的法医分析。
