Automated determination of total polyphenols in apple juice

Abstract

An automated method of total polyphenols analysis in apple juice using the Folin-Ciocalteu reagent is presented. Chlorogenic acid was selected as the standard since a similar kinetic behaviour, standard-sample, was observed. A straightforward method with good reproducibility (CV <1%), sampling="" frequency="" (48="">-1) and correlation with the traditional batch method (r=0.9924) is proposed.