Valorization of the Peel of Pitaya’s Fruit (Hylocereus polyrhizus) Producing Betalain-Rich Freeze-Dried Microparticles

Alves, Jonathan Neves de Carvalho; Oliveira, Natália Leite; Meira, Ana Cristina Freitas de Oliveira; Pio, Leila Aparecida Sales; Resende, Jaime Vilela de

doi:10.1007/s12649-023-02234-0

Cited by 1 publication

(1 citation statement)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…9,10 The presence of bioactive compounds of wide polarity hinders the use of a single and selective method for efficient extraction of all compounds. 11 The bioactive profile of pitaya peel has been published by other authors employing different extraction techniques, such as aqueous extraction, 12,13 but it is a simple method with some disadvantages, such as time and low extraction yield. 14 Ultrasound-assisted extraction 15,16 has a mechanical effect that improves solvent penetration into the sample matrix, 17 but ultrasonic waves can be associated with undesirable chemical effects, such as the production of free radicals.…”

Section: Introductionmentioning

confidence: 99%

Supercritical extraction of betalains from the peel of different pitaya species

Lacerda,

Bastante,

Machado

et al. 2024

J Sci Food Agric

View full text Add to dashboard Cite

BACKGROUNDPitaya is a fruit with high consumer acceptance and health benefits. Pitaya peel is a waste product with potential in the food industry, as an antioxidant enrichment and natural colouring. Therefore, there is an interest in recovering its constituents and searching for pitaya species with greater potential. This work aimed to obtain bioactive extracts from the dried peel of pitaya fruits of the species Selenicereus monacanthus (Lem.), Selenicereus costaricensis W. and Selenicereus undatus H. using supercritical fluids at different pressures (100, 250 and 400 bar) and ethanol/water 15% v/v or ethanol 100% as cosolvents. The extraction yield, antioxidant activity, colour and total betalains content were evaluated.RESULTSThe extract obtained from S. monacanthus showed the highest extraction yield (49.6 g kg‐1), followed by S. costaricensis (27.5 g kg‐1) and S. undatus (17.7 g kg‐1) at 400 bar and 35°C using ethanol 15 %v/v. The antioxidant capacity was strongly influenced by the pressure, favouring the obtaining of betalain‐rich extracts at higher pressures, especially in the species S. costaricensis (0.6 g kg‐1) and S. monacanthus (0.3 g kg‐1). To improve the extraction of S. undatus (the most cultivated species), the procedure of subsequential extractions was applied. This procedure considerably increased the extraction yield, antioxidant activity and total content of betalains. The use of ethanol 100% provided more bioactive fractions and achieved a good separation of betalains.CONCLUSIONThe supercritical extraction method can overcome the challenge of efficiently extracting compounds from pitaya peel, due to the presence of bioactive compounds of great polarity.This article is protected by copyright. All rights reserved.

show abstract