Elena Febri Kusumawati (1), Syarifa Ramadhani Nurbaya (2)
General Background: Natural plant pigments are increasingly utilized as alternatives to synthetic food colorants, including betacyanin compounds. Specific Background: Red dragon fruit peel contains betacyanin and is largely underutilized, while ohmic heating offers rapid and uniform extraction technology. Knowledge Gap: Limited studies evaluate solvent variation and electrical voltage in ohmic heating extraction related to betacyanin stability under pH and storage temperature conditions. Aims: This study examines the role of solvent type and electrical voltage in extracting betacyanin from red dragon fruit peel and evaluates pigment stability based on pH and temperature storage. Results: Extraction using distilled water, NaCl 0.25%, and citric acid 0.25% with 30V–50V treatments showed no significant difference in betacyanin content at pH 5 and 7. Storage in refrigerator and incubator conditions produced similar pigment stability, although incubator storage altered lightness values. Novelty: This study combines solvent and voltage variation in ohmic heating extraction with stability testing across pH and storage conditions. Implications: The findings support red dragon fruit peel utilization as a natural pigment source and provide reference for ohmic heating extraction processes in food applications.
Highlights:
Keywords: Betacyanin Pigment, Ohmic Heatin, Red Dragon Fruit Peel, Solvent Variation, Electrical Voltage
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