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Type: Artigo
Title: Extraction of natural antioxidants from strawberry guava leaf by conventional and non-conventional techniques
Author: Pigosso Coelho, Jaina Mara
Johann, Gracielle
da Silva, Edson Antonio
Palu, Fernando
Adeodato Vieira, Melissa Gurgel
Abstract: Natural extracts of strawberry guava leaf were obtained using the following techniques: supercritical CO2 extraction (at 14, 17, and 20 MPa and 35, 45, and 55 degrees C); dynamic maceration with hexane solvent; Soxhlet extraction; ultrasound-assisted extraction (at 40, 50, and 60 degrees C; 100, 300, and 500 W; 1:10, 15, and 20 g mL(-1)), and supercritical extraction followed by ultrasound. Yield results were 3.59% for Soxhlet extraction, 2.68% for ultrasound-assisted extraction, 1.46% for ultrasound re-extraction after supercritical extraction, 0.98% for dynamic maceration, and 0.86% for supercritical CO2 extraction. Natural extracts of strawberry guava leaves obtained via supercritical extraction were found to be rich in eudesmol, squalene, and vitamin E, in 11.03, 19.44, and 53.42% percentages, respectively. They also exhibited high antioxidant activity, 26.15 mu g mL(-1). This result was directly related to the alpha-tocopherol present in vitamin E
Subject: Vitamina E
Country: Estados Unidos
Editor: Taylor & Francis
Rights: Fechado
Identifier DOI: 10.1080/00986445.2020.1755658
Date Issue: Apr-2020
Appears in Collections:FEQ - Artigos e Outros Documentos

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