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Ionic Exchange Resins and Hydrogels for Capturing Metal Ions in Selected Sweet Dessert Wines

Tamasi, Gabriella ; Pardini, Alessio ; Bonechi, Claudia ; Donati, Alessandro ; Casolaro, Mario ; Leone, Gemma ; Consumi, Marco ; Cini, Renzo ; Magnani, Agnese ; Rossi, Claudio

Molecules (Basel, Switzerland), 2018-11, Vol.23 (11), p.2973 [Periódico revisado por pares]

Switzerland: MDPI AG

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Título:
Ionic Exchange Resins and Hydrogels for Capturing Metal Ions in Selected Sweet Dessert Wines
Autor: Tamasi, Gabriella ; Pardini, Alessio ; Bonechi, Claudia ; Donati, Alessandro ; Casolaro, Mario ; Leone, Gemma ; Consumi, Marco ; Cini, Renzo ; Magnani, Agnese ; Rossi, Claudio
Assuntos: Adsorption ; atomic absorption ; Calcium ; Color ; dessert wine ; Desserts ; Food industry ; Grapes ; Histidine ; Hydrogels ; Hydrogels - chemical synthesis ; Hydrogels - chemistry ; Hydrogen-Ion Concentration ; Ion exchange ; Ion exchange resins ; Ion Exchange Resins - chemistry ; ionic exchange resin ; Ions - chemistry ; Laboratories ; Magnesium ; Manganese ; Metal ions ; Metals ; Metals - chemistry ; Nutrients ; Opalescence ; Pigmentation ; Potassium ; Resins ; Vitaceae ; Wine - analysis ; Wines ; Zinc
É parte de: Molecules (Basel, Switzerland), 2018-11, Vol.23 (11), p.2973
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: Samples of sweet and dessert wines, Vin Santo (VSR) from Malvasia grapes, and Granello (GR) from Sauvignon grapes were collected and analyzed for the content of selected macro- and micro-nutrients (Na, K, Mg, Ca, Mn, Fe, Cu and Zn) and of Pb. GR wines had low levels for Fe, Cu and Zn, when compared to VSR and in particular Zn was two orders of magnitude lower. Methods to decrease the content of Zn and Cu in VSR, as well as those for reducing, at the same time, the concentrations of Ca, Mg and K in both VSR and GR, to avoid the formation of opalescence and depots of metal tartrates, were studied. Synthetic hydrogels containing l-histidine residue were tested. The overall relative lowering effects were by 4, 23, and 12% for K, Mg and Ca contents, and 6, 27 and 10%, for Mn, Cu and Zn contents, in GR wine samples. Commercial ion exchange resin Lanxess Lewatit L-207 and L-208 were then assayed, being legally allowed in the agro-food industry. The L-207 resin revealed great lowering effects on the concentrations of Mn, Cu and Zn, being 75, 91 and 97%, respectively, in VSR wines and 77, 76 and 92%, respectively, in GR wines. The content of Zn was reduced from 49.3 ± 1.2 mg/L in the original wine, down to 1.1 ± 0.1 mg/L, within 48 h soaking. The effects on the character of the dessert wines by the resin L-207 was also taken under control, measuring pH and color index. The color index changed by 15% and pH by 6% upon treatment of VSR wine with L-207 resins (48 h).
Editor: Switzerland: MDPI AG
Idioma: Inglês

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Ionic Exchange Resins and Hydrogels for Capturing Metal Ions in Selected Sweet Dessert Wines

Tamasi, Gabriella ; Pardini, Alessio ; Bonechi, Claudia ; Donati, Alessandro ; Casolaro, Mario ; Leone, Gemma ; Consumi, Marco ; Cini, Renzo ; Magnani, Agnese ; Rossi, Claudio

Switzerland: MDPI AG

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