Abstract
Some phenolic compounds, (+) catechin, (−) epicatechin, chlorogenic acid, phloretin glucoside (phloridzin) and phloretin xyloglucoside, in several juice samples were separated and identified by reversed phase high performance liquid chromatography/diode array detection (RP-HPLC/DAD). Dihydrochalcones were identified as ‘markers’ in apple samples, their content was calculated and a ‘threshold concentration’ for detectable addition was evaluated. The direct injection method gives excellent recovery, accuracy and precision with a detection limit of 1.6 mg/L.
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