Phenolic Characterization of Malbec Wines from Mendoza Province ArgentinaReportar como inadecuado




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Resumen

Malbec is a wine grape variety that is now mainly produced in Mendoza and considered to be theemblematic cultivar of Argentina. Forty-four phenolic compounds, including hydroxybenzoic andhydroxycinnamic acids and different flavonoids, were identified and quantified in 61 monovarietalMalbec wines from 11 geographical zones of Mendoza province, using a reversed phase highperformanceliquid chromatography system coupled to a diode array detector HPLC-DAD. Amongnon-flavonoids, gallic, cis-caftaric, trans-coutaric, and caffeic acids presented the higher concentrationsin all of the samples, whereas trans-resveratrol glucoside was present at concentrations from0.6 to 1.3 mg-L. For the flavonoids, þ-catechin and -epicatechin presented the higherconcentrations among flavan-3-ols with a ratio þ-catechin-epicatechin from 1.3 to 2.1. Anastilbin derivative and quercetin presented the higher concentrations for flavonols, whereasmalvidin-3-glucoside and its derivatives were the major anthocyanins. For the first time the phenoliccomposition of Malbec wines from Mendoza province has been characterized.



Autor: Fanzone, Martín; - Peña Neira, Alvaro; - Jofré, Viviana; - Assof, Mariela; - Zamora, Fernando; -

Fuente: http://repositorio.uchile.cl/



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