Influence of Winemaking Practices on the Concentration of Rare Earth Elements in White Wines Studied by Inductively Coupled Plasma Mass Spectrometry

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• 作者：Eugenio C. Rossano ; Zolt&aacute ; n Szil&aacute ; gyi ; Antonio Malorni ; Gabriella Pocsfalvi
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2007
• 出版时间：January 24, 2007
• 年：2007
• 卷：55
• 期：2
• 页码：311 - 317
• 全文大小：92K
• 年卷期：v.55,no.2(January 24, 2007)
• ISSN：1520-5118

文摘

Influence of clarification, filtration, and storage on the concentration of rare earth elements (REEs)was studied in white wines by inductively coupled plasma mass spectrometry (ICP-MS). Smoothand parallel chondrite-normalized (CN) plots were obtained for wines which have never been in contactwith fining agents. Clarification and filtration generally used in white wine production were simulatedin the laboratory using nontreated reference wines, and CN plots were compared before and aftertreatments. Clarification by bentonites yields an overall increase in REE concentrations resulting insubstantially parallel CN curves well above the plots of the corresponding nontreated wines. Filtrationusing silicate (SiO₂), on the other hand, changes the CN profile in a nonparallel manner due to ahigher release of La, Ce, Pr, Nd, and Gd, more than other elements studied. Filtration with cellulosepowder causes a small increase in the concentration of light REEs, while the concentrations of otherelements remain basically unchanged. Storage conditions could also affect the REE pattern of wine.We found that the influence of glass is greater than that of stainless steel and wood. In addition, wereport that commercially available finished white wines from the same region show highly differentREE patterns depending on the winemaking practices employed.