Effect of Ethanol Addition as Extraction Solvent on The Content of Bioactive Materials in Dragon Fruit Skin Extract and Powder

*Dian Shofinita scopus  -  Department of Food Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Indonesia
Yasid Bindar  -  Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Indonesia
Tjokorde Walmiki Samadhi  -  Department of Chemical Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Indonesia
Arwinda Aprillia Jaelawijaya  -  Department of Food Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Indonesia
Mifta Fawwaz  -  Department of Food Engineering, Faculty of Industrial Technology, Institut Teknologi Bandung, Indonesia
Received: 21 Nov 2019; Published: 30 Jun 2020.
Open Access Copyright (c) 2020 Reaktor
License URL: http://creativecommons.org/licenses/by-nc-sa/4.0

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Section: Research Article
Language: EN
Statistics: 142 35
Abstract

This study aims to produce natural pigments for food prepared from dragon fruit skin by extraction and freeze-drying and to assess the effect of additional ethanol as extraction solvent on the process yield. During extraction stage, the effect of solvent (pure water and additional ethanol) on the yield of bioactive materials was assessed. Furthermore, during freeze-drying, the effect of maltodextrin addition as carrier agent on the quality of powder has also been evaluated. It has been found that the addition of ethanol as extraction co-solvent may give a positive effect on the yield of bioactive materials in the dragon fruit skin extracts, including the contents of anthocyanin, betacyanin, and total phenolic compounds. Regarding freeze drying, it was found that high recoveries of bioactive materials (84-92%) had been achieved, which indicates that freeze-drying may be suitable for drying such heat-sensitive materials. In addition, it was found that the addition of 10% maltodextrin as carrier agent may decrease the moisture content of the powder significantly, up to 8.162.12%, which is beneficial for its storage stability.

Keywords: betacyanin; food additives; dragon fruit; extraction; anthocyanin.

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