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. 2013 Mar 28;18(4):3859–3871. doi: 10.3390/molecules18043859

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© 2013 by the authors; licensee MDPI, Basel, Switzerland.

This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/3.0/).

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On-line HPLC ABTS⁺ analysis of the Ilex paraguarienses beverage chimarrão (sample S2). Positive Trace: PDA at 280 nm and Negative Trace: UV-VIS at 600 nm. Peak identification: 1, caffeine; 2, 3-O-caffeoylquinic acid; 3, 5-O-caffeoylquinic acid; 4, teobromine; 5, 4-O-caffeoylquinic acid; 6, quercetin-3-rhamnosylglucoside; 7, quercetin-3-O-glucoside; 8, kaempferol-3-O-glucoside; 9, 3,5-dicaffeoylquinic acid; 10, 4,5-dicaffeoylquinic acid; 11, tricaffeoylquinic acid. Chromatographic conditions are described in the text.