Red wines from South America: Content of phenolic compounds and chemometric distinction by origin

摘要: Abstract With the purpose of evaluating wine grouping according to phenolic composition and geographical origin, eight individual phenolics were quantified in South American commercial red wines. Initially a simple chromatographic method was developed validated, because there is no official quantify compounds general. Then, analyzed by HPLC-UV/Vis using gradient elution. The linear ranges (mg L− 1): 0.4 22.0 (catechin quercetin-3-glucoside); 0.2 9.0 (gallic acid epicatechin); 0.05–1.5 (myricetin quercetin resveratrol) from 0.025 0.3 (kaempferol), with values r2 above 0.9958. results recovery test on two levels ranged 81.89 110.36%, for gallic acid, epicatechin, catechin, quercetin-3-glucoside, myricetin, resveratrol; 71.98 114.63% kaempferol. A principal component analysis (PCA) used investigate differences Brazilian Argentine wines their composition. Argentina showed higher than These suggest that samples preferentially follow biosynthetic route phenylalanine → cinnamic acid → benzoic acids derivatives (e.g. acid). On other hand, Syrah variety San Francisco Valley Northeastern Brazil had concentrations quercetin-3-glucoside resveratrol those Argentina, suggesting satisfactory adaptation this natural environment Northeast Brazil, “terroir”.