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Analytical Letters Volume 41, 2008 - Issue 3
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Voltammetry

Determination of Cu in Tequila by Anodic Stripping Voltammetry

Alejandra Carreon‐Alvarez Chemical Engineering Department, University of Guadalajara, Guadalajara, Jalisco, Mexico
,
Norberto Casillas Chemistry Department, University of Guadalajara, Guadalajara, Jalisco, Mexico
,
Jorge G. Ibanez Chemistry Department, University of Guadalajara, Guadalajara, Jalisco, Mexico; Chemical Engineering and Sciences Department, Universidad Iberoamericana. Prol. Paseo de la Reforma, México, D. F., México
,
Fernando Hernandez Chemical Engineering Department, University of Guadalajara, Guadalajara, Jalisco, Mexico
,
Rogelio Prado‐Ramírez CIATEJ, Guadalajara, Jalisco, Mexico
,
Maximiliano Barcena‐Soto Chemistry Department, University of Guadalajara, Guadalajara, Jalisco, Mexico
&
Sergio Go´mez-Salazar Chemical Engineering Department, University of Guadalajara, Guadalajara, Jalisco, MexicoCorrespondence[email protected]
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Pages 469-477 | Received 27 Apr 2007, Accepted 07 Jul 2007, Published online: 11 Feb 2008
 
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Abstract

Concentrations of metals such as copper in alcoholic beverages must be strictly regulated due to negative effects ranging from beverage spoilage and hazing, to sensorial and health consequences. In this paper, a voltammetric alternative is presented for the analysis of copper in tequila, a Mexican spirituous alcoholic beverage. Anodic Stripping Voltammetry is applied and the standard addition method is used to quantify copper in this beverage at concentrations commonly present in tequila (<10 ppm) without sample pretreatment. Copper can be reduced and then oxidized quantitatively and reproducibly. A comparison of Anodic Stripping Voltammetry with Atomic Absorption Spectrometry is presented.

Financial support from CONACYT (Mexico) through grant No. 38679‐U and CIATEJ (Jalisco, Mexico) is gratefully acknowledged

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