Hot Acid Extraction, Characterisation and Scavenging Activity of Pectin from Hylocereus polyrhizus

Hot Acid Extraction, Characterisation and Scavenging Activity of Pectin from Hylocereus polyrhizus

Pages 276-282

Nurrulhidayah Ahmad Fadzillah1, Rashidi Othman1,*, Norazian Mohd. Hassan2, Nurul Widad Fitri Muhammad, Ainaa Eliah Abu Bakar1, Nur Hidayah Noh1 and Noraini Mahmad1

1International Institute for Halal Research and Training (INHART), Herbarium Unit, Department of Landscape
Architecture, Kulliyyah of Architecture and Environmental Design, International Islamic University Malaysia,
53100 Kuala Lumpur, Malaysia
2Department of Pharmaceutical Chemistry, Kulliyyah of Pharmacy, International, Islamic University Malaysia,
25200 Kuantan, Malaysia

DOI: https://doi.org/10.29169/1927-5951.2019.09.05.6

Abstract: Gelatin is extensively added to the food products for quality improvements of food entities. The role of gelatin as food thickener, texturizer, stabilizer, ingredient and as an animal based source has restricted its liberal use. However, the usage of this animal-based food quality improver has become less popular due to religious constraints and health restrictions. In fact, it is now direly needed to replace animal-based gelatin by plant-based. Pectin, the basic building material of cell walls in the terrestrial plant has great potential to be gelatin replacer as it can work as a gelling agent, thickener and also a stabilizer. Dragon fruit contains pectin which has high-value functional food as well as healthenhancing properties to substitute gelatin’s function in foods production. The current study aims to extract pectin from dragon fruit peels by using hot acid extraction. The optimum conditions for extraction were found to be at 75ºC and pH 3.5 based on the highest percentage of pectin yield (33%). The FTIR result proved that dragon fruit peel contained pectin, which can be used as gelatin replacer are free from any religious and health-wise prohibitions. Pectin extracted was characterized in terms of moisture (14.03 ± 1.925) and ash content (8.73 ± 1.218). The extracted pectin of dragon fruit peel acts as the best gelatin replacer compared to commercial pectin and gelatins from the market. The prepared fruit peels also exhibit high DPPH scavenging activity (57.94%) with methanol extract (2mg/ml).

Keywords: Pectin, gelatin, Hylocereus polyrhizus, antioxidant, hot acid extraction.