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Qualitative data analysis for an exploratory sensory study of Grechetto wine
Marco Esti1, Ricardo L González Airola, Elisabetta Moneta
1Food Science and Technology Dep., Tuscia University, via S. Camillo De Lellis, 01100 Viterbo, Italy. esti@unitus.it
Analytica Chimica Acta
|January 28, 2010
Summary
This study identifies key sensory markers for Grechetto wine, revealing distinct olfactory and gustative profiles. Vintage significantly impacts flavor development, with young wines showing fruity and herbaceous notes, while aged wines exhibit sweeter, mineral characteristics.
Area of Science:
- Enology and Viticulture
- Sensory Science
- Food Chemistry
Background:
- Grechetto is a traditional Italian white grape with limited documented sensory characteristics.
- Understanding Grechetto's sensory profile is crucial for its commercial value and regional identity.
Purpose of the Study:
- To identify sensory markers of Grechetto wine.
- To evaluate the influence of clone, geographical area, vintage, and producer on Grechetto's sensory attributes.
Main Methods:
- A qualitative sensory study involving a trained panel analyzing 16 Grechetto wines.
- Utilized correspondence analysis and principal component analysis (PCA) on 133 wine descriptors.
- Data analysis focused on linking sensory attributes to wine variables like vintage and clone.
Main Results:
- Seventeen terms, including 10 olfactory descriptors (fruity, apple, acacia, pineapple, banana, floral, herbaceous, honey, apricot, peach), characterize Grechetto wine.
- PCA revealed olfactory terms dominated the first principal component and gustative attributes the second.
- Vintage significantly affected sensory profiles: young wines featured sulphur, yeast, and tropical fruit notes, while aged wines developed honey, caramel, and mineral notes.
Conclusions:
- Established key sensory markers for Grechetto wine, providing a basis for quality assessment.
- Demonstrated the significant impact of vintage on Grechetto's evolving sensory profile.
- Highlighted the potential for Grechetto wine to develop complex aging characteristics.
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