Exploratory multiblock analysis demonstrates origin-specific chemical and elemental fingerprints in grapes and wines, highlighting strategies for geographical authenticity verification.
The geographical traceability of grapes and wines produced under Geographical Indications remains a key challenge for authenticity verification and market regulation. This study applied a multiblock data analysis approach to explore relationships among datasets describing the elemental and chemical composition of soils, grapes, and wines from the delimited region of the Goethe Grape's Valley Geographical Indication (GI), Brazil. Soil inorganic composition was determined using X-ray fluorescence, while organic acids, polyphenols and elemental composition, including rare earth elements, of grape and wine samples were determined by high-performance liquid chromatography and inductively coupled plasma mass spectrometry, respectively. Common Dimensions (ComDim) analysis indicated that the integration of organic acid profiles and elemental composition revealed exploratory patterns among grape samples associated with vineyard location. For wines, the dataset revealed that elemental composition was the primary factor, with polyphenols contributing secondarily. These results provide a preliminary scientific basis for the origin traceability and authentication of Goethe grapes and wines produced under the GI territory.
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Mazon‐Freitas et al. (2026) studied this question.
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