Answers are grounded in this paper and cite their sources.
The neutral phenolic compounds, (+)-catechin, (-)-epicatechin, flavan-3-ols polymers (procyanidins), phloridzin, phloretin xyloglucoside, and the flavonol glycosides (isoquercitrin, hyperin, quercitrin, avicularin, and rutin), in apple juice were extracted with ethyl acetate and separated and quantified by reversed-phase HPLC on a C18 column using an acidified water (pH 2.8)-methanol solvent gradient. A diode array detector was used to evaluate the separation and to identify the phenolic compounds. The recovery obtained for the flavanols and some dihydrochalcones ranged between 93% and 106%. On the contrary, the 30% recovery rate obtained for flavonols shows that ethyl acetate liquid-liquid extraction, usually employed in this type of study, is not recommended for the extraction of these last compounds.
No takes yet. Share an insight, caveat, or question.
Valles et al. (1994) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: