(Article)
Instituto de Química Orgánica General (CSIC), C/Juan de la Cierva, 3, Madrid, Spain
Abstract
Microwave assisted extraction (MAE) and pressurized liquid extraction (PLE) methods using water as solvent have been optimized by means of a Box-Behnken and 32 composite experimental designs, respectively, for the effective extraction of bioactive carbohydrates (inositols and inulin) from artichoke (Cynara scolymus L.) external bracts. MAE at 60 °C for 3 min of 0.3 g of sample allowed the extraction of slightly higher concentrations of inositol than PLE at 75 °C for 26.7 min (11.6 mg/g dry sample vs. 7.6 mg/g dry sample). On the contrary, under these conditions, higher concentrations of inulin were extracted with the latter technique (185.4 mg/g vs. 96.4 mg/g dry sample), considering two successive extraction cycles for both techniques. Both methodologies can be considered appropriate for the simultaneous extraction of these bioactive carbohydrates from this particular industrial by-product. To the best of our knowledge this is the first time that these techniques are applied for this purpose. © 2015 Elsevier Ltd.
Author keywords
Artichoke external bracts; Inositols; Inulin; MAE; PLE
Indexed keywords
Engineering controlled terms: Alcohols; Carbohydrates; Polysaccharides; Sugars
Artichoke external bracts; Inositols; Inulin; MAE; PLE
Engineering main heading: Extraction
EMTREE drug terms: carbohydrate; inositol; inulin; solvent; water
EMTREE medical terms: artichoke; Article; bract; controlled study; dry weight; extraction and extracts; fractionation; microwave assisted extraction; microwave radiation; molecular weight; pressurized liquid extraction; yeast
Chemicals and CAS Registry Numbers: inositol, 55608-27-0, 6917-35-7, 87-89-8; inulin, 9005-80-5; water, 7732-18-5
