Department of Analytical Chemistry, Faculty of Science, IVAGRO, Campus of Puerto Real, University of Cádiz, Puerto Real, 11510 Cádiz, Spain.
Bodegas Fundador S.L.U., C/San Ildefonso, n 3, Jerez de la Frontera, 11403 Cádiz, Spain.
J Agric Food Chem. 2024 Jan 31;72(4):1959-1968. doi: 10.1021/acs.jafc.3c00501. Epub 2023 May 2.
Oak wood is the main material used by coopers to manufacture casks for the aging of spirits or wines. Phenolic compounds are the main components extracted from the wood during spirit aging. In the present study, a chemometric approach based on unsupervised (PCA) and supervised (PLS-DA) pattern recognition techniques has been applied to the chromatographic instrumental fingerprints, obtained by ultra-high-performance liquid chromatography (UHPLC) at 280 nm, of the phenolic profiles of brandies aged in casks made of different oak wood species. The resulting natural data groupings and the PLS-DA models have revealed that the oak wood species, the toasting level, and the aging time are the most influential factors on the phenolic profile of the final products. Fingerprinting should be considered as a very useful feature, as it represents a considerable advantage, in terms of internal and quality control, for brandy producers.
橡木是制桶商用来制造烈酒或葡萄酒陈酿桶的主要材料。酚类化合物是橡木在陈酿过程中提取的主要成分。在本研究中，应用了一种基于无监督（PCA）和有监督（PLS-DA）模式识别技术的化学计量学方法，对不同橡木种类桶陈白兰地的酚类图谱的色谱仪器指纹图谱进行了分析，这些指纹图谱是通过超高效液相色谱（UHPLC）在 280nm 处获得的。所得自然数据分组和 PLS-DA 模型表明，橡木种类、烘烤程度和陈酿时间是对最终产品酚类图谱影响最大的因素。指纹图谱应被视为一个非常有用的特征，因为它在内部和质量控制方面为白兰地生产商提供了相当大的优势。
