Comparative chemometric analyses of geographic origins and compositions of lavandin var. Grosso essential oils by mid infrared spectroscopy and gas chromatography.
Lavandin, a sterile hybrid of Lavandula angustifolia P. Mill. x Lavandula latifolia (L.f.) Medikus (Lamiaceae) is a plant widely cultivated for essential oil production in the South of France. Chemometric treatment by mid-infrared (MID-IR) spectroscopy data was assessed for the differentiation of Grosso Lavandin Essential Oils of Controlled Area (GLEOCA) and results were compared to those obtained by gas chromatography for MID-IR short time technique validation. The quantification of the main 13 hydrocarbons and oxygenated compounds generally controlled by industrial perfumers in GLEOCA samples (n=83) of three geographic origins: "Simiane", "Puimoisson" (with two producers) and "Richerenches" and their classification were successfully obtained by partial least square discriminant analysis (PLS-DA) by comparison with gas chromatography. The best prediction results were obtained using first derivate spectral data in the 1800-700 cm(-1) range. The spectroscopic interpretation of regression vectors showed that each geographic origin was correlated to components of GLEOCA. Chemometric MID-IR spectra treatments allowed us to obtain similar results than those obtained by time consuming analytical techniques such as GC and therefore constitute a robust and help fast method for authentication of GLEOCA and should be extended to other essential oils for authentication of geographic origin.
Bombarda
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Equipe Phytochimie, UMR CNRS 6171, Systèmes chimiques complexes, Case 461, Université Paul Cézanne, 13397 Marseille Cedex 20, France. isabelle.bombarda@univ-cezanne.fr
Dupuy
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Da
J-P Le Van
JP
Gaydou
E M
EM
D002849:Chromatography, Gas; D016018:Least-Squares Analysis; D009822:Oils, Volatile / Q000032:analysis / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared
D009822:Oils, Volatile