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ISSN 1511-3701

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Characterization and Quantification of Dragon Fruit (Hylocereus polyrhizus) Betacyanin Pigments Extracted by Two Procedures

Nassim Naderi, Hasanah M. Ghazali, Anis Shobirin Meor Hussin, Mehrnoush Amid and Mohd Yazid Abd. Manap

Pertanika Journal of Tropical Agricultural Science, Volume 35, Issue 1, February 2012

Keywords: Hylocereus polyrhizus, Betacyanins, Betanin, Phyllocactin, Hylocerenin

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A method for the extraction of betacyanins pigments of dragon fruit (Hylocereus polyrhizus) grown in Malaysiawas studied. A processing scheme consisting of solvent system selection (ethanolic and aqueous ethanolic)was proposed to study the effect of water in enhancing betacyanin recovery from the pulp of H. polyrhizusfruit. Betacyanins, in concentrated extracts from the dragon fruit (H. polyrhizus), were identified as betanin,phyllocactin, hylocerenin and their respective C-15 isoforms using High-performance liquid chromatographic(HPLC) analysis. Structural alteration was monitored by using selected solvent systems. As for the relativepeak area ratios, some betacyanins showed a higher stability than others. Betanin, one of the main betacyanin inselected Malaysian H. polyrhizus cultivars, displayed the most stable structure. Comparing the peak area ratiosof individual betacyanins, it was noticed that ethanolic assay might induce co-occuring of the C-15 isoforms.

ISSN 1511-3701

e-ISSN 2231-8542

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