Galtier O, Le Dréau Y, Ollivier D, Kister J, Artaud J, Dupuy N
Systèmes chimiques complexes, Université P. Cézanne, UMR CNRS 6171, case 451, 13397 Marseille cedex 20, France.
Appl Spectrosc. 2008 May;62(5):583-90. doi: 10.1366/000370208784344479.
The combination of mid-infrared (MIR) spectroscopy with multivariate analysis provides an original approach to study the profile of virgin olive oils (VOOs) in relation to composition and geographical origin. Chemometric treatment of mid-infrared spectra (n=402) is assessed for quantification of fatty acids (14 components) and triacylglycerols (19 components) in VOO samples and for classification into six very geographically closed registered designations of origin (RDOs) of French VOO ("Aix-en-Provence", "Haute-Provence", "Vallée des Baux de Provence", "Nice", "Nîmes", and "Nyons"). Spectroscopic interpretation of regression vectors has shown that each RDO is correlated to one specific component of VOO according to their cultivar compositions. The results are satisfactory, in spite of the similarity of cultivar compositions between two denominations of origin ("Aix-en-Provence" and "Vallée des Baux de Provence"). Chemometric treatment of MIR spectra makes it possible to obtain similar results to those obtained by time-consuming analytical techniques such as gas chromatography (GC) and high-performance liquid chromatography (HPLC) and constitutes a fast and robust tool for authentication of these French VOOs.
中红外（MIR）光谱与多变量分析相结合，为研究初榨橄榄油（VOO）的成分和地理来源提供了一种全新的方法。对402个中红外光谱进行化学计量学处理，以定量分析VOO样品中的脂肪酸（14种成分）和三酰甘油（19种成分），并将其分类为法国VOO的六个地理上非常相近的注册原产地名称（RDO）（“普罗旺斯地区艾克斯”、“上普罗旺斯”、“普罗旺斯地区莱博谷”、“尼斯”、“尼姆”和“尼奥恩”）。回归向量的光谱解释表明，根据品种组成，每个RDO与VOO的一种特定成分相关。尽管两个原产地名称（“普罗旺斯地区艾克斯”和“普罗旺斯地区莱博谷”）的品种组成相似，但结果令人满意。对MIR光谱进行化学计量学处理能够获得与耗时的分析技术（如气相色谱法（GC）和高效液相色谱法（HPLC））相似的结果，并且构成了一种快速且可靠的工具，用于鉴定这些法国VOO。
