Microwave-Assisted Extraction of Phenolic Compounds from Almond Skin Byproducts (Prunus amygdalus): A Multivariate Analysis Approach

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Title: Microwave-Assisted Extraction of Phenolic Compounds from Almond Skin Byproducts (Prunus amygdalus): A Multivariate Analysis Approach
Authors: Valdés, Arantzazu | Vidal, Lorena | Beltrán Sanahuja, Ana | Canals, Antonio | Garrigós, María del Carmen
Research Group/s: Análisis de Polímeros y Nanomateriales | Espectroscopía Atómica-Masas y Química Analítica en Condiciones Extremas
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología
Keywords: Microwave-assisted extraction | Phenolic compounds | Almond skin | HPLC-DAD-ESI-MS/MS | Antioxidant activity | Linear discriminant analysis
Knowledge Area: Química Analítica | Nutrición y Bromatología
Issue Date: 25-May-2015
Publisher: American Chemical Society
Citation: Journal of Agricultural and Food Chemistry. 2015, 63(22): 5395-5402. doi:10.1021/acs.jafc.5b01011
Abstract: A microwave-assisted extraction (MAE) procedure to isolate phenolic compounds from almond skin byproducts was optimized. A three-level, three-factor Box–Behnken design was used to evaluate the effect of almond skin weight, microwave power, and irradiation time on total phenolic content (TPC) and antioxidant activity (DPPH). Almond skin weight was the most important parameter in the studied responses. The best extraction was achieved using 4 g, 60 s, 100 W, and 60 mL of 70% (v/v) ethanol. TPC, antioxidant activity (DPPH, FRAP), and chemical composition (HPLC-DAD-ESI-MS/MS) were determined by using the optimized method from seven different almond cultivars. Successful discrimination was obtained for all cultivars by using multivariate linear discriminant analysis (LDA), suggesting the influence of cultivar type on polyphenol content and antioxidant activity. The results show the potential of almond skin as a natural source of phenolics and the effectiveness of MAE for the reutilization of these byproducts.
Sponsor: We acknowledge the Spanish Ministry of Economy and Competitiveness for financial support (MAT-2011-28468-C02-01). A.V. thanks Conselleria de Educación (Spain) for ACIF/2010/172 Predoctoral Research Training Grant.
URI: http://hdl.handle.net/10045/47518
ISSN: 0021-8561 (Print) | 1520-5118 (Online)
DOI: 10.1021/acs.jafc.5b01011
Language: eng
Type: info:eu-repo/semantics/article
Rights: © 2015 American Chemical Society
Peer Review: si
Publisher version: http://dx.doi.org/10.1021/acs.jafc.5b01011
Appears in Collections:INV - NANOBIOPOL - Artículos de Revistas
INV - SP-BG - Artículos de Revistas
INV - AAQCN - Artículos de Revistas

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