Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7584533 | Food Chemistry | 2018 | 23 Pages |
Abstract
This is the first report investigating the effects of cultivation, growth under full sunlight (MSL) or shade (MS), and processing (drying, sapeco and roasting) on the composition and antioxidant potential of maté. Samples were roasted (180â¯Â°C, 200â¯Â°C, 220â¯Â°C or 240â¯Â°C) for a fixed time (10â¯min) or roasted (10, 20, 30 or 40â¯min) at a fixed temperature (200â¯Â°C). HPLC/UV/MS analysis and measures of total phenolic content (TPC) and antioxidant activity (2,2-diphenyl-1-picrylhydrazyl (DPPH) inhibition and soybean oil oxidation) were used to analyse phytochemicals. There were significant differences (pâ¯<â¯0.05, ANOVA/Tukey) in phenolics between MS and MSL samples following certain processing steps, but Principal Component Analysis (PCA) indicated no distinction between MS and MSL samples, suggesting that light intensity had no effect on phenolics. Caffeine increased significantly (pâ¯<â¯0.05) in MS samples. Temperature was more important than time, since pyrolysis of phenolics was more intense at 240â¯Â°C.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Liza Ghassan Riachi, Daniel Luiz Reis Simas, Geraldo Ceni Coelho, Paulo Sérgio Marcellini, Antônio Jorge Ribeiro da Silva, Carlos Alberto Bastos de Maria,