title: Usefulness of the direct coupling headspace-mass spectrometry for sensory quality characterization of virgin olive oil samples.
abstract: The applicability of the headspace coupled to mass spectrometry for evaluation of the sensory quality of virgin olive oil samples is presented. The volatiles of the oil are directly transferred from the sample vial to the detector without chromatographic separation. The mass spectrum obtained can be considered as a fingerprint of the oil sample and can be used for classification purposes. After a training step with samples previously qualified following the official method, a classification model was created using the supervised technique soft independent modeling of class analogy (SIMCA). Eight negative (rancid, winey-vinegary, muddy sediment, hay-wood, vegetable water, earthy, fusty and musty-humidity) and three principal positive attributes (fruity, bitter and pungent) have been included in this study. With them, a classification model consisting of two main classes (extra- and lampante-virgin olive oil) was constructed. In addition, the unsupervised technique cluster analysis permitted the discrimination among oils with different negative attributes. The proposed procedure has been applied to the classification of commercial samples (as extra- or lampante-virgin olive oils) and the results were compared with those provided by the expert's panel with acceptable correlation.
authors: CIFA Venta del Llano, IFAPA, Ctra. Bailén-Motril km 18.5 Mengibar, E-23620 Jaén, Spain.
authors: Silvia
authors: S
authors: López-Feria
authors: Soledad
authors: S
authors: Cárdenas
authors: José Antonio
authors: JA
authors: García-Mesa
authors: Miguel
authors: M
authors: Valcárcel
mesh_terms: D005504:Food Analysis / Q000379:methods*; D013058:Mass Spectrometry / Q000379:methods; D000069463:Olive Oil; D010938:Plant Oils / Q000032:analysis* / Q000737:chemistry; D012680:Sensitivity and Specificity; D013649:Taste
chemical_list: D000069463:Olive Oil; D010938:Plant Oils