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The Natural Products Journal

Editor-in-Chief

ISSN (Print): 2210-3155
ISSN (Online): 2210-3163

Insoluble Solids in Brazilian and Floridian Acai (Euterpe oleraceae Mart.)

Author(s): Robert E. Smith, Janete Eaker, Kevin Tran, Michael Goerger, Wei Wycoff, Armando U. O. Sabaa-Srur and Ellen M. da Silva Menezes

Volume 2 , Issue 2 , 2012

Page: [95 - 98] Pages: 4

DOI: 10.2174/2210315511202020095

Price: $65

Abstract

Brazilian and Floridian acai were found to contain 24% insoluble solids. They were dark brown and were not soluble in hexane, methanol or water. When 6 N HCl was added to the insoluble solids, they turned red, as do anthocyanins. The solids were analyzed by CP-MAS 13C-NMR. Phenolic C-O, aromatic, glycosidic and aliphatic carbons were detected. About 27% of the solids were hydrolyzed and solubilized by refluxing in conc HCl. Acai is a unique fruit in that it is sold as a product that has a relatively high amount of insoluble solids. So, two things that genuine, unfiltered acai should have are about 24% insoluble solids and the appropriate CP-MAS 13C-NMR spectrum.

Keywords: Acai, CP-MAS NMR, anthocyanins, aroma, minerals, edible proteins, dietry fibres, pulp, citric acid, fruit


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