Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/5606
Título: Effect of bentonite characteristics on the elemental composition of wine
Autor: Catarino, Sofia
Madeira, Manuel
Monteiro, F.
Rocha, F.
Curvelo-Garcia, A.S.
Sousa, Raul Bruno
Palavras-chave: wine
contaminant elements
bentonite physical and chemical characteristics
Data: 2008
Editora: American Chemical Society
Citação: "Journal of Agricultural and Food Chemistry". ISSN 0021-8561. 56 (2008) 158-165
Resumo: Physical, chemical, and mineralogical characteristics of six bentonites were assessed and related to their elemental release to wine. Extraction essays of bentonites in wine at three pH levels were carried out. The multielemental analysis of bentonites and wines was performed by atomic absorption spectrometry (AAS) and inductively coupled plasma mass spectrometry (ICP-MS). Bentonite addition resulted in significantly higher concentrations of Li, Be, Na, Mg, Al, Ca, Sc, V, Mn, Fe, Co, Ni, Ga, Ge, As, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Ba, W, Tl, Bi, and W. In contrast, the concentrations of B, K, Cu, Zn, and Rb significantly decreased. A strong correlation between Na concentrations of treated wines and its content in bentonite exchange complex was observed. Al and Fe contents reflected bentonite extractable aluminous and ferruginous constituents, while Be, Mg, Ca, V, Mn, Ni, Ge, Zr, Nb, Mo, Sn, Sb, Tl, Pb, and U concentrations reflected the elemental composition of bentonites. Several nonconformances with OIV specifications demonstrated the need for an effective control.
Peer review: yes
URI: http://hdl.handle.net/10400.5/5606
ISSN: 0021-8561
Aparece nas colecções:DCA - Artigos de Revistas

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