Laboratory of Instrumental Analysis at Federal Institute of Rio de Janeiro (IFRJ), Duque de Caxias Campus, República do Paraguai Avenue, 120, Code 25050-10, Sarapuí, Duque de Caxias, RJ, Brazil; LADEQ - Laboratory of Chemistry Engineering Department at Federal University of Rio de Janeiro (UFRJ), Athos da Silveira Ribeiro Avenue, 164 Block E Code 21941-909, Technology Center/School of Chemistry, Cidade Universitária, Ilha do Fundão, Rio de Janeiro, RJ, Brazil.
Laboratory of Environment at Federal Institute of Rio de Janeiro (IFRJ), Rio de Janeiro Campus, Senador Furtado Street, 121, Code 20270-021, Maracanã, Rio de Janeiro, RJ, Brazil.
Waste Manag. 2017 Nov;69:463-469. doi: 10.1016/j.wasman.2017.08.043. Epub 2017 Aug 31.
Espresso capsule consumption and spent coffee ground (SCG) generation have increased, and the present study was undertaken to evaluate the volatile profile (VP), the antioxidant activity (AA) and the sun protection factor (SPF) of the Crude ethanolic extract obtained from the SCG in capsules. The extract yield was superior to the ether yield because a higher unsaponifiable matter (U.M.) amount was recovered by ethanol. The obtained VP (70 compounds) was typical of roasted coffee oil. Furthermore, chemometric analysis using principal components (PCA) discriminated the extracts and grouped the replicates for each sample, which showed the repeatability of the extraction process. The AA ranged from 18.4 to 23.6 (mg extract mg DPPH) and the SPF from 2.27 to 2.76. The combination of the coffee VP, AA and SPF gave the espresso SCG's crude ethanolicextract, desirable properties that can be used in cosmetic and food industries.
浓咖啡胶囊的消费和废咖啡渣（SCG）的产生有所增加，本研究旨在评估从胶囊中 SCG 获得的粗乙醇提取物的挥发性成分（VP）、抗氧化活性（AA）和防晒因子（SPF）。由于乙醇可以回收更多的不可皂化物（U.M.），因此提取物的产率优于醚的产率。所得 VP（70 种化合物）是典型的烤咖啡油。此外，使用主成分（PCA）的化学计量分析对提取物进行了区分，并对每个样品的重复样本进行了分组，这表明了提取过程的可重复性。AA 范围为 18.4 至 23.6（mg 提取物 mg DPPH），SPF 范围为 2.27 至 2.76。咖啡 VP、AA 和 SPF 的结合为浓咖啡 SCG 的粗乙醇提取物赋予了在化妆品和食品工业中使用的理想特性。
