| Abstract
| - The polyphenolic composition of natural ciders from the Asturian community (Spain), during 2consecutive years, was analyzed by RP-HPLC and the photodiode-array detection system, withoutprevious extraction (direct injection). A total of 16 phenolic compounds (catechol, tyrosol, protocatechuic acid, hydrocaffeic acid, chlorogenic acid, hydrocoumaric acid, ferulic acid, (−)-epicatechin,(+)-catechin, procyanidins B2 and B5, phloretin-2‘-xyloglucoside, phloridzin, hyperin, avicularin, andquercitrin) were identified and quantified. A fourth quercetin derivative, one dihydrochalcone-relatedcompound, two unknown procyanidins, three hydroxycinnamic derivatives, and two unknowncompounds were also found. Among the low-molecular-mass polyphenols analyzed, hydrocaffeicacid was the most abundant compound, representing more than 80% of the total polyphenolic acids.Procyanidins were the most important family among the flavonoid compounds. Discriminant analysiswas allowed to correctly classify more than 93% of the ciders, according to the harvest year; themost discriminant variables were an unknown procyanidin and quercitrin. Keywords: Polyphenols; cider; HPLC; multivariate techniques
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