Establishment of the varietal profile of Vitis vinifera L. grape varieties from different geographical regions based on HS-SPME/GC-qMS combined with chemometric tools

• Type: Article in International Scientific Journal
• Date: 2014

Authors

Perestrelo, R (Author) Other; Barros, AS (Author) Other; Rocha, SM (Author) Other; Camara, JS (Author) Other

Journal

Title: Microchemical Journal

Vol. 116

Pages: 107-117

ISSN: 0026-265X

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 30 Citations

Scopus - 36 Citations

Other information

Authenticus ID: P-009-HRJ

DOI: 10.1016/j.microc.2014.04.010

Abstract (EN): The varietal volatile profiles of pulp and skin fractions from the main red and white Vitis vinifera L. grape varieties used in the production of Madeira wine (Portugal) were established by headspace solid phase microextraction (SPME) combined with gas chromatography-quadrupole mass spectrometry (GC-qMS) tandem with chemometric tools. A total of 60 varietal volatile compounds 27 in pulp and 42 in skin of V. vinifera L grapes studied, were identified, including 27 monoterpenic, 26 sesquiterpenic and 7 C13 norisoprenoid compounds. Principal Component Analysis (PCA) and Hierarchical Clusters Analysis (HCA) results demonstrated that independently of grape fractions, a distribution by grape variety (white and red) as well as by Terroir effect, was attained using the varietal volatiles from skin grape fraction. Bual, Malvasia Candida and Malvasia Branca (white varieties) exhibited different varietal volatile profiles, independently of grape fractions, skin or pulp. This difference could be explained by the highest sesquiterpenic level found in Bual grape variety, and monoterpenic level found in Malvasia Candida and Malvasia Branca grape varieties. The obtained data suggests that climatic factors, such as altitude, temperature and humidity influenced the varietal profile from the target varieties, as the varietal profile of grapes cultivated at Est:reito de Camara de Lobos (32 39'50.59"N; 16 58'48.28"W) and Jardim da Serra (32 41' 42.36"N; 16 59'3732"W) showed qualitative and quantitative differences (expressed as GC peak area) when compared to varietal profile of grapes cultivated at Estreito da Calheta (32 44'0.09"N; 17 11'14.80"W), independently of the grape fractions (pulp or skin). Moreover, the cultivation of recommended grapes to produce Madeira wines Malvasia Branca, Terrantez and Bastardo, should be promoted as their varietal volatile profile is quite similar to that found in noble varieties (Malvasia Candida and Sercial, respectively).

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 11