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Direct Determination of Zn, Cd, Pb and Cu in Wine by Differential Pulse Anodic Stripping Voltammetry

School of Chemical and Food, Federal University of Rio Grande, Av. Itália, km 8, P.O. Box 474, Rio Grande, RS 96203-900, Brazil
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Beverages 2019, 5(1), 6; https://doi.org/10.3390/beverages5010006
Received: 19 November 2018 / Revised: 13 December 2018 / Accepted: 4 January 2019 / Published: 11 January 2019
(This article belongs to the Special Issue Current Trends in Analytical Techniques for Beverage Analysis)
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Abstract

Metals in wine can originate from natural and anthropogenic sources and their concentrations have significant effects on wine proprieties as well in its conservation. In this work, direct and simultaneous determinations of Zn, Cd, Pb and Cu in wine samples were carried out by differential pulse anodic stripping voltammetry without any steps of previous pretreatment. The samples analyzed presented concentration levels from 4.64 to 69.3 µg L−1 of Zn, from 1.74 to 5.25 µg L−1 of Cd, from 4.57 to 17.9 µg L−1 of Pb and from 1.0 to 10.3 µg L−1 of Cu. Accuracy was evaluated with the standard addition method and recoveries ranged from 82.5 and 130.8% for Zn, from 85.7 to 107.0% for Cd, from 89.7 to 101.0% for Pb and from 81.4 to 105.9% for Cu. With the application of this method, it was possible to quantify the metals in a simple and easy way not requiring sample preparation or other approaches for the destruction of organic substances. View Full-Text
Keywords: direct analyses; differential pulse anodic stripping voltammetry (DPASV); metals; wine direct analyses; differential pulse anodic stripping voltammetry (DPASV); metals; wine
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Maciel, J.V.; Souza, M.M.; Silva, L.O.; Dias, D. Direct Determination of Zn, Cd, Pb and Cu in Wine by Differential Pulse Anodic Stripping Voltammetry. Beverages 2019, 5, 6.

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