Anthocyanins from juçara fruits were extracted by pressurized liquid extraction (PLE)
or ultrasound-assisted extraction (UAE), using aqueous solutions of 1,2-alkanediols and glycerol
ethers as biobased solvents. The PLE (100 bar, 13 min, 1 mL/min flow rate) in the optimal extraction
conditions originated 23.1 mganthocyanins gdry biomass
-1. On the other hand, the UAE was 10 min
long, and the optimal conditions using 1,2-propanediol were 42.6 wt%, 160 W, and pH 7.0, leading to
50 mganthocyanins gdry biomass
1. Extractions at the UAE optimized conditions, with aqueous solutions
of five different 1,2-alkanediols and three glycerol ethers were performed, and compared to water
and ethanolic extracts. The biobased solvent solutions presented anthocyanin yields up to 33% higher
than water, and were shown to be as efficient as ethanol/water, but generated extracts with higher
antioxidant capacity. The anthocyanin-rich extract of juçara, obtained with 1,2-propanediol, was used
in the production of a natural soap and incorporated into a cream, showing that the addition of the
juçara extract resulted in an antioxidant capacity in both products.
This work was developed within the scope of the project CICECO-Aveiro Institute of
Materials, UIDB/50011/2020, UIDP/50011/2020, and LA/P/0006/2020, financed by national funds
through the FCT/MCTES (PIDDAC). The authors are grateful to the Foundation for Science and
Technology (FCT, Portugal) for the financial support through national funds FCT/MCTES (PIDDAC)
to CIMO (UIDB/00690/2020 and UIDP/00690/2020) and SusTEC (LA/P/0007/2021). Bruna P.
Soares is also grateful for the financial support provided by the Portuguese Foundation for Science
and Technology (FCT) for the doctoral grant SFRH/BD/138439/2018. Finally, the authors are
grateful to the Brazilian funding agencies for the financial support and fellowship. Specifically, CNPq
(National Council of Technological and Scientific Development, Brazil), Project 404347/2016-9, CAPES
(Coordination for the Improvement of Higher-Level Personnel, Brazil), projects CAPES/PROEX-
1624/2018 and CAPES/PRINT88887.310560/2018-00.
