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

Abstract

Hibiscus sabdariffa L. calyces are a source of phenolic compounds which provide high antioxidant activity. The aim of this work was to improve the stability of roselle extracts by spray‐drying using combinations of maltodextrin (MD) and gum arabic (GA) as carrier agents, preserving the antioxidant compounds. MD:GA matrices resulted in a very good option to produce roselle powders with excellent physical properties: low moisture content (<1.7g H2O/100 g d.m.) and water activity (<0.26); high glass transition temperature (42–48°C), and very high solubility (>99%). The powders showed low cohesiveness and a very good flowability. Higher GA in the matrix improved the retention of anthocyanins (171.21 ± 0.13 mg cyn‐3‐glu/100 g d.m.), polyphenols (465.80 ± 0.13 mg GAE/100 g d.m.) and the antioxidant capacity (95.5 ± 0.82 mmol Trolox/kg d.m.). These powders could be applied as an instant “agua de jamaica” product, giving an easy preparation method for the consumer. The antioxidant capacity of the reconstituted roselle powders was similar to those of mango and pineapple freshly squeezed juices, suggesting that this beverage could provide a relevant functional input. Practical applications Mexico is one of the largest consumers among Latin American countries of a refreshing infusion called “agua de jamaica” made from Hibiscus sabdariffa. The main drawback of this beverage lies in its short shelf life. In this work, we showed that spray‐drying proved to be an adequate process for obtaining an alternative product that presents higher stability while retaining the functional characteristics of the original drink.

Fabrication of Spray-Dried Microcapsules Containing Noni Juice Using Blends of Maltodextrin and Gum Acacia: Physicochemical Properties of Powders and Bioaccessibility of Bioactives during In Vitro Digestion

“…In this case, therefore, it makes the bioactive compounds less susceptible to degradation during digestion. The results found in the present study are supported by the investigations on microencapsulation of turmeric oleoresin [ 57 ] and spray-dried roselle ( Hibiscus sabdariffa L.) extract using similar carriers [ 58 ].…”

Microencapsulation of roselle (Hibiscus sabdariffa L.) anthocyanins: Effects of drying conditions on some physicochemical properties and antioxidant activities of spray‐dried powder

“…Furthermore, the increased anthocyanin content caused the extracts and powder to become a deeper red hue, lowering the brightness and chroma of the samples. This result was also supported by Archaina et al (2019), who discovered that as anthocyanin concentrations rose, the color attributes of spray-dried hibiscus powder samples decreased.…”

Research on complex enzyme system to extract Hibiscus Sabdariffa L reducing sugar

“…Dissolved a total of 182 g of potassium sodium tartrate in 500 ml water to prepare potassium sodium tartrate hot solution. 6.3 g of 3,5-Dinitrosalicylic acid was weighed, 262 ml of 2 mol/L NaOH was added to the hot solution of potassium sodium tartrate, then 5 g of crystalline phenol and 5 g of sodium bisulfite were added, stirred and dissolved (Archaina et al, 2019). After cooling, the volume was fixed to 1000 ml and stored in a brown bottle for standby.…”