Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8891168 | LWT - Food Science and Technology | 2018 | 20 Pages |
Abstract
Samples of chia seeds (Salvia hispánica L.) were degreased by cold pressing and the residue obtained named degreased chia seeds (DCS) had the antioxidants extract obtained. A 22 experimental design was employed in order to evaluate the factors ethanol concentration and extraction time. The optimized conditions were extraction time 15â¯min with ethanol 70% where the activity (RSA), evaluated by the DPPH (2,2-diphenyl-1-picryl-hydrazyl) method was 94.76%. For this extract, the total phenolics content was 359.64â¯mg EGA/100â¯g. A pseudo-univariate calibration model is proposed as an alternative methodology to determine the %RSA by using the relative concentration from multivariate curve resolution with alternating least squares (MCR-ALS) from near-infrared (NIR) spectra of the antioxidant extract from DCS. The results suggest the possibility of %RSA determination directly from NIR spectra from extracts from DCS by using the multivariate resolution method MCR-ALS.
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Authors
Mirian S. Laczkowski, Thays R. Gonçalves, Sandra T.M. Gomes, Paulo Henrique Março, PatrÃcia Valderrama, Makoto Matsushita,