de Macêdo Isaac Yves Lopes, Garcia Luane Ferreira, Oliveira Neto Jerônimo Raimundo, de Siqueira Leite Karla Carneiro, Ferreira Valdir Souza, Ghedini Paulo César, de Souza Gil Eric
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Faculdade de Farmácia, Universidade Federal de Goiás, Rua 240 com 5a avenida, Setor Universitário, Goiânia, Goiás, Brazil.
Food Chem. 2017 Feb 15;217:326-331. doi: 10.1016/j.foodchem.2016.08.082. Epub 2016 Aug 26.
Red fruits are rich sources of antioxidant compounds with recognized health benefits. Since they are perishable, dried extracts emerge as more durable products and their quality control must include antioxidant capacity assays. In this study, the redox behavior of commercial dried products obtained from camu-camu, açai, acerola and cranberry red fruits was evaluated by electroanalytical approaches. The antioxidant potential was determined by 2,2-diphenyl-1-picrylhydrazyl free radical assay and the electrochemical index concept. The total phenol content was estimated by using a laccase based biosensor. A significant correlation was found between all methods and literature data. The voltammetric profile (cyclic, differential and square wave) obtained for each type of dried extract showed distinguishable features that were correlated with their main major markers, being also useful for identification purposes. The electrochemical methods were cheaper and more practical for evaluation of antioxidant properties and total phenol content in dried powders obtained from different red fruits.
红色水果富含具有公认健康益处的抗氧化化合物。由于它们易腐烂，干提取物成为更耐用的产品，其质量控制必须包括抗氧化能力测定。在本研究中，通过电分析方法评估了从卡姆果、阿萨伊果、针叶樱桃和蔓越莓红色水果获得的市售干制品的氧化还原行为。通过2,2-二苯基-1-苦基肼自由基测定法和电化学指数概念测定抗氧化潜力。使用基于漆酶的生物传感器估计总酚含量。发现所有方法与文献数据之间存在显著相关性。每种干提取物获得的伏安曲线（循环、差分和方波）显示出可区分的特征，这些特征与它们的主要主要标志物相关，也可用于鉴定目的。电化学方法对于评估从不同红色水果获得的干粉中的抗氧化性能和总酚含量更便宜且更实用。
