Myo-inositol polyalcohol is a characteristic component of natural and concentrated grape musts (CMs), and Regulation (EU) no. 1308/2013 prescribes its presence as a marker of the authenticity of rectified concentrated must (RCM). Other polyalcohols besides myo-inositol, such as scyllo-inositol or minor sugars, could be considered authenticity markers, but an extensive search in the literature yielded no exhaustively investigated study of their concentration variability in genuine products. The aim of this study was to create an extensive national data bank of minor carbohydrates profiles and investigate the impact of the geographical origin and the different vintages on the concentration of these compounds; to this end, 450 authentic Italian grape musts of different varieties were sampled and analyzed during the harvest season in 2019, 2020, and 2021. The grape musts from the Italian wine-growing areas CII and CIIIb had myo- and scyllo-inositol contents always higher than 756 and 39 mg/kg of sugar, respectively. Conversely, also considering other mono- and disaccharides, sucrose, sorbitol, lactose, maltose, and isomaltose showed contents always lower than 534, 1207, 390, 2222, and 1639 mg/kg of sugar, respectively. The general applicability to the CM and RCM of the proposed authenticity thresholds, established in the must, was demonstrated by studying the influence of must concentration on the myo- and scyllo-inositol content. Inter-laboratory comparison experiments were also conducted to harmonize and characterize laboratory methods and validate the analytical dataset. Based on the obtained results, the text of the EU legislation (Reg. (EU) 1308/2013), which defines the characteristics of the must and the CRM product, should be revised

Paolini, M.; Perini, M.; Allari, L.; Tonidandel, L.; Finato, F.; Guardini, K.; Larcher, R. (2023-04-20). Myo-inositol, scyllo-inositol and other minor carbohydrates as authenticity markers for the control of Italian bulk, concentrate and rectified grape must. MOLECULES, 28 (8): 3609. doi: 10.3390/molecules28083609 handle: https://hdl.handle.net/10449/85155

Myo-inositol, scyllo-inositol and other minor carbohydrates as authenticity markers for the control of Italian bulk, concentrate and rectified grape must

Paolini, Mauro
Primo
;
Perini, Matteo
;
Tonidandel, Loris;Larcher, Roberto
Ultimo
2023-04-20

Abstract

Myo-inositol polyalcohol is a characteristic component of natural and concentrated grape musts (CMs), and Regulation (EU) no. 1308/2013 prescribes its presence as a marker of the authenticity of rectified concentrated must (RCM). Other polyalcohols besides myo-inositol, such as scyllo-inositol or minor sugars, could be considered authenticity markers, but an extensive search in the literature yielded no exhaustively investigated study of their concentration variability in genuine products. The aim of this study was to create an extensive national data bank of minor carbohydrates profiles and investigate the impact of the geographical origin and the different vintages on the concentration of these compounds; to this end, 450 authentic Italian grape musts of different varieties were sampled and analyzed during the harvest season in 2019, 2020, and 2021. The grape musts from the Italian wine-growing areas CII and CIIIb had myo- and scyllo-inositol contents always higher than 756 and 39 mg/kg of sugar, respectively. Conversely, also considering other mono- and disaccharides, sucrose, sorbitol, lactose, maltose, and isomaltose showed contents always lower than 534, 1207, 390, 2222, and 1639 mg/kg of sugar, respectively. The general applicability to the CM and RCM of the proposed authenticity thresholds, established in the must, was demonstrated by studying the influence of must concentration on the myo- and scyllo-inositol content. Inter-laboratory comparison experiments were also conducted to harmonize and characterize laboratory methods and validate the analytical dataset. Based on the obtained results, the text of the EU legislation (Reg. (EU) 1308/2013), which defines the characteristics of the must and the CRM product, should be revised
Characterization
Data bank
Grape must
Minor carbohydrates
Myo-inositol
Scyllo-inositol
Settore CHIM/10 - CHIMICA DEGLI ALIMENTI
20-apr-2023
Paolini, M.; Perini, M.; Allari, L.; Tonidandel, L.; Finato, F.; Guardini, K.; Larcher, R. (2023-04-20). Myo-inositol, scyllo-inositol and other minor carbohydrates as authenticity markers for the control of Italian bulk, concentrate and rectified grape must. MOLECULES, 28 (8): 3609. doi: 10.3390/molecules28083609 handle: https://hdl.handle.net/10449/85155
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/85155
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