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Journal of the American Oil Chemists' Society

, Volume 93, Issue 3, pp 373–381 | Cite as

Protected Designation of Origin Extra Virgin Olive Oils Assessment by Nuclear Magnetic Resonance and Multivariate Statistical Analysis: “Terra di Bari”, an Apulian (Southeast Italy) Case Study

  • Laura Del Coco
  • Donato Mondelli
  • Giuseppe Natale Mezzapesa
  • Teodoro Miano
  • Sandra Angelica De Pascali
  • Chiara Roberta Girelli
  • Francesco Paolo Fanizzi
Original Paper

Abstract

We report a study on the chemical characterization of 102 monovarietal micro-extracted and genetically characterized extra virgin olive oils (EVOOs) from Coratina, Ogliarola Barese and Cima di Mola cultivar, according to “Terra di Bari” (Apulia, southeast Italy) PDO requirement. Three additional geographical mentions, all belonging to the same Bari district (Bitonto, Castel del Monte and Murgia dei Trulli e delle Grotte), were studied and potential microclimate differences were evaluated. Our results indicate the possibility of distinguishing EVOOs from the same “Terra di Bari” PDO with respect to different cultivars and (to some extent) different subareas. In particular, two cultivars (Ogliarola Barese and Coratina), obtained from the same Bitonto area, and a single cultivar (Coratina), obtained from Bitonto and Castel del Monte subareas, were compared to investigate the micro-area pedoclimatic effect. Finally, 1H NMR data were found significant for classification purposes of unknown EVOO samples, the results of which were included in the model space, as they were correctly predicted by the OPLS-DA obtained by 1H NMR data. This work aims to classify commercial “Terra di Bari” PDO EVOOs by comparison of the declared cultivar and geographical origin with a reference dataset of genetically characterized micro-extracted monovarietal oils. In conclusion, the effect of the pedoclimatic micro-areas of origin on the Coratina cultivar, which is the main component of the “Terra di Bari” PDO, has been studied in order to improve the traceability of the raw material used to produce this valuable food.

Keywords

EVOOs PDO NMR spectroscopy MVA analysis PCA OPLS-DA 

Abbreviations

BIT

Bitonto

CDM

Castel del Monte

EVOOs

Extra virgin olive oils

MTG

Murgia dei Trulli e delle Grotte

MVA

Multivariate analysis

PCA

Principal component analysis

PDO

Protected designation of origin

PLS

Partial least-squares discriminant analysis

OPLS-DA

Orthogonal partial least-squares discriminant analysis

Notes

Acknowledgments

The authors would like to express their gratitude to Regione Puglia (Italy) for funding the project PIF (misura 124 PSR 2007-2013) – “Olio Terra di Bari: miglioramento della qualità delle acque di vegetazione e caratterizzazione geografica e varietale dell’olio di oliva DOP “Terra di Bari”

Supplementary material

11746_2015_2778_MOESM1_ESM.doc (4.8 mb)
Supplementary material 1 (DOC 4872 kb)

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Copyright information

© AOCS 2015

Authors and Affiliations

  • Laura Del Coco
    • 1
  • Donato Mondelli
    • 2
  • Giuseppe Natale Mezzapesa
    • 3
  • Teodoro Miano
    • 2
  • Sandra Angelica De Pascali
    • 1
  • Chiara Roberta Girelli
    • 1
  • Francesco Paolo Fanizzi
    • 1
  1. 1.Di.S.Te.B.A., Dipartimento di Scienze e Tecnologie Biologiche ed AmbientaliUniversità del SalentoLecceItaly
  2. 2.Di.S.S.P.A., Dipartimento di Scienze del Suolo, della Pianta e degli AlimentiUniversità degli Studi di Bari Aldo MoroBariItaly
  3. 3.CIHEAM - Istituto Agronomico Mediterraneo di BariValenzanoItaly

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