Physical and functional properties of spray-dried powders from blackcurrant juice and extracts obtained from the waste of juice processing

Abstract

Blackcurrants contain high levels of polyphenolics, particularly flavonols and anthocyanins, which contribute to their high antioxidant activity. The aims of this work were the recovery of bioactive compounds from the remaining solid (waste) after processing blackcurrant juice and to obtain spray-dried powders from the blackcurrant juice and extracts. The extraction of bioactive compounds from the fruit pulp was performed by ultrasound-assisted extraction. Experiments were conducted to select the more suitable solvent, and citric acid was chosen. Then, to optimize the extraction conditions (time, solvent concentration, and amplitude) an experimental design using a Box-Behnken Design was done. Comparing the optimized extract with the fruit, 31% total monomeric anthocyanins, 19% total phenolic compounds, and 10% antioxidant capacity were obtained. The optimized extract and the juice were mixed and spray dried, using maltodextrin as carrier matrix. A blackcurrant powder with low hygroscopicity 14.46 ± 0.13 (g a.w./100 g d.m) and high solubility 94.25 ± 4% was obtained. High concentration of bioactive compounds and antioxidant capacity was recorded: Total monomeric anthocyanins 63.01 ± 1 (mg cyn-3-glu/100 g.d.m), total phenolic content 116.87 ± 5 (mg gallic acid/100 g d.m.), and antioxidant capacity 144.40 ± 0.11 (mg eq Trolox/100 g.d.m.).

Physical and functional properties of roselle ( Hibiscus sabdariffa L .) extract spray dried with maltodextrin‐gum arabic mixtures

“…TMA content was measured using the method employed by Archaina, Leiva, Salvatori, and Schebor (). The results were expressed as mg of cyanidin‐3‐glucoside per 100 g of dry matter (mg cyn‐3‐glu/100 g d.m.…”

“…TPC determination was carried out using the method followed by Archaina et al (). Solutions of gallic acid (0.1–0.3 mg/ml) were used to construct the calibration curve ( y = 5.065 x + 0.033; r 2 = 0.998).…”

Blackcurrants (Ribes nigrum): A Review on Chemistry, Processing, and Health Benefits

“…As the name implies, SFE‐CO 2 involves the use of carbon dioxide, which is of low toxicity and generally recognized as safe (GRAS) by the Food and Drug Administration (Basegmez et al., ). Another study performed ultrasound‐assisted extractions (UAE) of BCP by using water acidified with citric acid (Archaina et al., ). In this work, it was documented that UAE is a viable method for the extraction of bioactive compounds from BCP.…”

“…Furthermore, in this same study, the investigators used a maltodextrin carrier matrix to spray dry the extracts. It was concluded in this research that the obtained powder maintained high levels of total ANC and total phenolic contents (63.01 ± 1 mg eq C3G/100 g dry material and 116.87 ± 5 mg eq gallic acid/100 g dry material, respectively; Archaina et al, 2018). Conventional drying methods, such as convective drying, freeze-drying, and microwave vacuum drying, offer less expensive alternatives to SFE-CO 2 for the recovery and use of BCP; however, they do have some limitations.…”

“…This is why it is quite common to find BC products with significant amounts of sugar added. BC are also known to have a high concentration of flavonoids, specifically anthocyanins (ANC), which provide the fruits with their purple color (Archaina, Leiva, Salvatori, & Schebor, ). These winter hardy berries are a rich source of phytochemicals that are potent antioxidants, antimicrobials, and have anti‐inflammatory properties (Nour, Stampar, Veberic, & Jakopic, ).…”