PACKAGING BARRIER EFFECTS ON PHYSICOCHEMICAL STABILITY AND COLOR CHANGES OF FLAVORED YERBA MATE (Ilex paraguariensis) DURING STORAGE
DOI:
https://doi.org/10.18624/e-tech.v19i1.1481Palavras-chave:
atividade da água, estabilidade de armazenamento, estabilidade da cor, Ilex paraguariensis;, materiais de embalagemResumo
Yerba mate (Ilex paraguariensis) tea is one of the most consumed beverages in South America. Environmental conditions and packaging barrier properties strongly influence the quality of stored yerba mate, but despite its commercial importance, few studies have evaluated the effects of packaging systems on the stability of artificially flavored yerba mate. Therefore, this study investigates the influence of different packaging materials (such as transparent polyethylene plastic, stand-up pouches, glass jars, and plastic combined with metal cans) on the physicochemical properties and color stability of mint-flavored yerba mate during storage. Yerba mate leaves were flavored with mint flavoring (3% w/w) and stored for 62 days under environmental conditions simulating commercial storage. Moisture content, pH, water activity (aw), and color parameters (L*, a*, b*, chroma, and total color difference ΔE) were evaluated at 0, 30, and 62 days. The results showed a gradual increase in pH and significant variations in water activity (Aw) during storage, with plastic packaging exhibiting higher Aw values than the other systems. Color analysis revealed a decrease in luminosity (L*) and shifts in chromatic coordinates (a* and b*), suggesting pigment degradation and oxidative reactions during storage. Among the evaluated systems, a stand-up pouch combined with a metal can showed the least significant loss of yerba mate's green and yellow color. These results highlight the importance of selecting packaging materials with improved barrier properties to preserve the physicochemical quality of flavored yerba mate during storage.
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Copyright (c) 2026 Tania Maria Costa, Arthur Patzlaff, Meiryel Lopes da Silva, Marcela Kotsuka da Silva, Carolina Krebs de Souza

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