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Recognition of volatile compounds as markers in geographical discrimination of Spanish extra virgin olive oils by chemometric analysis of non-specific chromatography volatile profiles.
J Chromatogr A. 2011 Jan 21; 1218(3):518-23.JC

Abstract

Chromatographic profiles obtained by headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography (GC) were processed as continuous and non-specific signals through multivariate analysis techniques in order to select and identify the most discriminate volatile marker compounds related to the geographical origin of extra virgin olive oils. The blind analysis of the chromatographic profiles was carried out on several steps including preliminary mathematical treatments, explorative analysis, feature selection and classification. The results obtained through the application of stepwise linear discriminant analysis (SLDA) method revealed a perfect discrimination between the different Spanish geographical regions considered (La Rioja, Andalusia and Catalonia). The assignment success rate was 100% in both classification and prediction by using cross validation procedure. In addition, it must be noted that the proposed strategy was able to verify the geographical origin of the samples involving only a reduced number of discriminate retention times selected by the stepwise procedure. This fact emphasizes the quality of the accurate results obtained and encourages the feasibility of similar procedures in olive oil quality and traceability studies. Finally, volatile compounds corresponding to the predictors retained were identified by gas chromatography-mass spectrometry (GC-MS) for a chemical interpretation of their importance in quality virgin olive oils.

Authors+Show Affiliations

Department of Chemistry, University of La Rioja, C Madre de Dios 51, 26006 Logroño, La Rioja, Spain. consuelo.pizarro@unirioja.esNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

21163487

Citation

Pizarro, C, et al. "Recognition of Volatile Compounds as Markers in Geographical Discrimination of Spanish Extra Virgin Olive Oils By Chemometric Analysis of Non-specific Chromatography Volatile Profiles." Journal of Chromatography. A, vol. 1218, no. 3, 2011, pp. 518-23.
Pizarro C, Rodríguez-Tecedor S, Pérez-del-Notario N, et al. Recognition of volatile compounds as markers in geographical discrimination of Spanish extra virgin olive oils by chemometric analysis of non-specific chromatography volatile profiles. J Chromatogr A. 2011;1218(3):518-23.
Pizarro, C., Rodríguez-Tecedor, S., Pérez-del-Notario, N., & González-Sáiz, J. M. (2011). Recognition of volatile compounds as markers in geographical discrimination of Spanish extra virgin olive oils by chemometric analysis of non-specific chromatography volatile profiles. Journal of Chromatography. A, 1218(3), 518-23. https://doi.org/10.1016/j.chroma.2010.11.045
Pizarro C, et al. Recognition of Volatile Compounds as Markers in Geographical Discrimination of Spanish Extra Virgin Olive Oils By Chemometric Analysis of Non-specific Chromatography Volatile Profiles. J Chromatogr A. 2011 Jan 21;1218(3):518-23. PubMed PMID: 21163487.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Recognition of volatile compounds as markers in geographical discrimination of Spanish extra virgin olive oils by chemometric analysis of non-specific chromatography volatile profiles. AU - Pizarro,C, AU - Rodríguez-Tecedor,S, AU - Pérez-del-Notario,N, AU - González-Sáiz,J M, Y1 - 2010/11/27/ PY - 2010/07/20/received PY - 2010/10/01/revised PY - 2010/11/23/accepted PY - 2010/12/18/entrez PY - 2010/12/18/pubmed PY - 2011/4/22/medline SP - 518 EP - 23 JF - Journal of chromatography. A JO - J Chromatogr A VL - 1218 IS - 3 N2 - Chromatographic profiles obtained by headspace solid-phase microextraction (HS-SPME) coupled with gas chromatography (GC) were processed as continuous and non-specific signals through multivariate analysis techniques in order to select and identify the most discriminate volatile marker compounds related to the geographical origin of extra virgin olive oils. The blind analysis of the chromatographic profiles was carried out on several steps including preliminary mathematical treatments, explorative analysis, feature selection and classification. The results obtained through the application of stepwise linear discriminant analysis (SLDA) method revealed a perfect discrimination between the different Spanish geographical regions considered (La Rioja, Andalusia and Catalonia). The assignment success rate was 100% in both classification and prediction by using cross validation procedure. In addition, it must be noted that the proposed strategy was able to verify the geographical origin of the samples involving only a reduced number of discriminate retention times selected by the stepwise procedure. This fact emphasizes the quality of the accurate results obtained and encourages the feasibility of similar procedures in olive oil quality and traceability studies. Finally, volatile compounds corresponding to the predictors retained were identified by gas chromatography-mass spectrometry (GC-MS) for a chemical interpretation of their importance in quality virgin olive oils. SN - 1873-3778 UR - https://www.unboundmedicine.com/medline/citation/21163487/Recognition_of_volatile_compounds_as_markers_in_geographical_discrimination_of_Spanish_extra_virgin_olive_oils_by_chemometric_analysis_of_non_specific_chromatography_volatile_profiles_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0021-9673(10)01619-5 DB - PRIME DP - Unbound Medicine ER -