期刊
INDUSTRIAL CROPS AND PRODUCTS
卷 105, 期 -, 页码 29-40出版社
ELSEVIER
DOI: 10.1016/j.indcrop.2017.05.008
关键词
Gomphrena globosa L.; Betacyanin; Natural colorant; Microwave extraction; Ultrasound extraction; Response surface methodology
资金
- Foundation for Science and Technology (FCT, Portugal)
- FEDER under Programme PT2020 [UID/AGR/00690/2013, SFRH/BPD/107855/2015, SFRH/BD/117995/2016]
- Associate Laboratory LSRE-LCM - FEDER through COMPETE2020 - Programa Operacional Competitividade e Internacionalizacdo (POCI) [POCI-01-0145-FEDER-006984]
- FCT Fundacao para a Ciencia e a Tecnologia
- Xunta de Galicia
Gomphrena globosa L. is a source of betacyanins, molecules with high colorant power. In order to replace conventional extraction techniques, microwave (MAE) and ultrasound assisted extraction (UAE) processes were optimized by the response surface methodology (RSM) to maximize the recovery of betacyanins from G. globosa. A five-level full factorial design of 24 combinations and 4 replicates was implemented for MAE and UAE. The optimum processing conditions for MAE (t = 8 min; T = 60 degrees C; Et = 0%; and S/L = 5 g/L) conducted to an extraction yield of 39.6 +/- 1.8 mg/g dry weight, while for UAE (t = 22 min; P = 500%; Et = 0%; and S/L = 5 g/L) a value of 46.9 +/- 4.8 mg/g was achieved, validating the UAE more suitable to obtain the target compounds. This technique can provide extracts rich in betacyanins and with high potential to be used as natural colorants.
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