Department of Biological and Agricultural Engineering, 277 DS Weaver Labs, North Carolina State University, Raleigh, NC 27695-7625, United States.
Centro de Investigación en Matemáticas Puras y Aplicadas, Universidad de Costa Rica, Apartado Postal 2060 San Pedro de Montes de Oca, Costa Rica, United States.
Food Chem. 2020 Jun 1;314:125959. doi: 10.1016/j.foodchem.2019.125959. Epub 2019 Dec 9.
Anthocyanins from purple-fleshed sweetpotatoes constitute highly valued natural colorants and functional ingredients. In the past, anthocyanin extraction conditions and efficiencies using a single acidified solvent have been assessed. However, the potential of solvent mixes that can be generated by fermentation of biomass-derived sugars have not been explored. In this study, the effects of single and mixed solvent, time, temperature, sweetpotato genotype and preparation, on anthocyanin and phenolic extraction were evaluated. Results indicated that unconventional diluted solvent mixes containing acetone, butanol, and ethanol were superior or equally efficient for extracting anthocyanins when compared to commonly used concentrated extractants. In addition, analysis of anthocyanidins concentrations including cyanidin (cy), peonidin (pe), and pelargonidin (pl), indicated that different ratios of pn/cy were obtained depending on the solvent used. These results could be useful when selecting processing conditions that better suit particular end-use applications and more environmentally friendly process development for purple sweetpotatoes.
紫甘薯中的花色苷是一种具有高价值的天然色素和功能性成分。过去，人们评估了使用单一酸化溶剂提取花色苷的条件和效率。然而，尚未探索可以通过生物量衍生糖发酵产生的溶剂混合物的潜力。在这项研究中，评估了单一溶剂和混合溶剂、时间、温度、甘薯基因型和制备方法对花色苷和酚类物质提取的影响。结果表明，与常用的浓缩提取剂相比，含有丙酮、丁醇和乙醇的非常规稀溶剂混合物在提取花色苷方面更优越或同样有效。此外，对包括矢车菊素 (cy)、芍药素 (pe) 和天竺葵素 (pl) 在内的花色苷浓度的分析表明，根据所用溶剂的不同，获得了不同的 pn/cy 比值。当选择更适合特定最终用途应用的加工条件和更环保的紫薯加工方法时，这些结果可能会很有用。
