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METHODOLOGICAL EVALUATION FOR THE DETERMINATION OF TANNIN IN CASHEW JUICE

TÂNIA DA SILVEIRA AGOSTINI-COSTA, DEBORAH DOS SANTOS GARRITI, LARA LIMA, SERGIMARA FREIRE, FERNANDO ANTONIO PINTO ABREU, TEREZINHA FEITOSA

Abstract

The objective of this research was the evaluation of principal methodologies available for determination of phenolic compounds in cashew juice. The Folin-Denis, Folin-Ciocalteau, and Prussian blue assays (oxidation-reduction methods) presented vitamin C interference in the analytical results. Although less sensitive, the Vanillin and Protein Precipitation assays showed more specificity for tannin determination in cashew juice. The Vanillin method added as advantage its simplicity.

Keywords

SUCO DE CAJU; COMPOSTOS FENÓLICOS; DETERMINAÇÃO DE TANINOS-METODOLOGIAS. CASHEW JUICE; PHENOLIC COMPOUNDS; DETERMINATION OF TANNIN CONTENT-METHODOLOGIES.