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Development of a SBSE-TD Method Coupled to GC-MS and Chemometrics for the Differentiation of Variety and Processing Conditions in Peach Juices

Development of a SBSE-TD Method Coupled to GC-MS and Chemometrics for the Differentiation of Variety and Processing Conditions in Peach Juices

Alexis Marsol-Vall, Mercè Balcells, Jordi Eras, Ramon Canela-Garayoa

Food Chem. 2018 Jan 15;239:119-125.

PMID: 28873539

Abstract:

Peach juices of distinct varieties, namely yellow- and red-fleshed, and commercial and freshly blended were analyzed. The method used was based on Stir Bar Sorptive Extraction (SBSE) involving a polydimethylsiloxane-coated stir bar with thermal desorption (TD), followed by gas chromatography coupled to mass spectrometry (GC-MS) analysis. The resulting analytical data included 41 compounds belonging to several chemical classes, such as aldehydes, alcohols, lactones, terpenoids, fatty aldehydes, fatty acids and hydrocarbons. Furthermore, chemometric data treatment using unsupervised analysis (PCA) proved useful to classify peach juices on the basis of variety. Stepwise Linear Discriminant Analysis (SLDA) showed that a reduced number of variables (14 compounds), including lactones (6-pentyl-α-pyrone, γ-decalactone, γ-dodecalactone, and δ-dodecalactone), fatty acids (hexadecanoic acid), fatty aldehydes (tetracosanal and octacosanal), hydrocarbons (C23, C26, C27, C29, and C33), and alcohols (phytol and α-tocopherol), were necessary to classify the juice samples according to variety and processing conditions.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP713951	δ-Dodecalactone		713-95-1	Price

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