Study of Optimal Temperature, pH and Stability of Dragon Fruit (Hylocereus polyrhizus) Peel for Use as Potential Natural Colorant


	Pakistan Journal of Biological Sciences
	Year: 2008 \| Volume: 11 \| Issue: 18 \| Page No.: 2259-2263 DOI: 10.3923/pjbs.2008.2259.2263

Study of Optimal Temperature, pH and Stability of Dragon Fruit (Hylocereus polyrhizus) Peel for Use as Potential Natural Colorant

K.V. Harivaindaran, O.P.S. Rebecca and S. Chandran

Abstract: The peel of Hylocereus polyrhizus is often regarded as a waste hence this study was aimed at exploring the feasibility of using the peel as a natural colorant using simple water extraction method. Samples were subjected to a series of temperatures: Room temperature (RT), 50, 80 and 100°C; varied length of heating time from 1, 2, 3, 4, 5 and 10 min and a varied range of pH using 1 M of citric acid solution. The best condition to obtain highest betacyanin content was heating samples at 100°C for 5 min in a pH 5 citric acid solution. The next part of this study involved the stability test of the pigments obtained through the best method determined earlier. The pigments were dried and resuspended in distilled water. The samples were then exposed to light to monitor pigment changes. Initial resuspension of the dried pigments yielded a comparable high content of betacyanins to its juice counterpart. The results showed that resuspended pigments had high pigment retention and were stable up to 7 days. These initial findings must be further studied in more controlled conditions to understand the stability of betacyanin. Nevertheless, the results show that betacyanin obtained from the peel of dragon fruit has a high potential to be used as a natural dye.

PDF Fulltext XML References Citation Report Citation

RELATED ARTICLES:

•	Morphological Characterization and Adaptation of Four Dragon Fruit Genotypes in Pangandaran Regency of Indonesia

•	Optimization of Dyed Extract Condition from Nypa Palm Bark using Central Composite Design

•	Resistance in Series Model for Ultrafiltration Betacyanin from Hylocereus polyrhizus Peels

How to cite this article:

K.V. Harivaindaran, O.P.S. Rebecca and S. Chandran, 2008. Study of Optimal Temperature, pH and Stability of Dragon Fruit (Hylocereus polyrhizus) Peel for Use as Potential Natural Colorant. Pakistan Journal of Biological Sciences, 11: 2259-2263.

DOI: 10.3923/pjbs.2008.2259.2263

URL: https://scialert.net/abstract/?doi=pjbs.2008.2259.2263

COMMENT ON THIS PAPER

	Full Name:
	E-mail:
	Comments:

Navigation


		Online First
		Current Issue
		Previous Issues
		Editorial Board
		Submit a Manuscript
		Guide to Authors
		Subscribe to E-alerts

Indexed In


		AGRIS
		ASCI-Database
		Asian Digital Library
		Cambridge Scientific Abstract
		Chemical Abstract Services
		Google Scholar
		ISI Web of Knowledge
		PubMed
		SCIMAGO
		Thomson ISI

Follow @scialert

Science Alert