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Bioactives from pomegranate peel and moringa leaves as natural antioxidants for stability of edible oil blends

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Abstract

The present study investigates oxidative stability using the Rancimat and the Schaal oven test of blends of various edible oils with medium chain triacylglycerols containing natural antioxidants extracted from moringa leaves and pomegranate peel. The moringa leaves and pomegranate peel extract yield was 19.8% and 44.6% respectively whereas the antioxidant activity quantified using the DPPH radical scavenging activity was 95.1% and 92.5% respectively at loading of 900 ppm of extract. The natural extracts also demonstrated efficient antimicrobial activity. The stability of blends was assessed in terms of peroxide value, and using the shall oven test and rancimat study. It was clearly demonstrated that the natural extracts retarded the rate of oxidation in the blends at ambient temperature and also at elevated temperature. In addition, the induction time for rancimat study was higher in the presence of natural extracts demonstrating enhanced shelf life of the blends. Overall, it was clearly demonstrated that natural antioxidants could substitute harmful and carcinogenic chemical antioxidants.

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Abbreviations

BHA:

Butylated hydroxyanisole

BHT:

Butylated hydroxytoluene

DPPH:

2,2-Diphenyl-1-picrylhydrazyl

IT:

Induction time

LCT:

Long-chain triacylglycerols

MCT:

Medium chain triacylglycerols

MOL:

Moringa oleifera Leaves

MOLE:

Moringa oleifera Leaves extract

PP:

Pomegranate peel

PPE:

Pomegranate peel extract

PV:

Peroxide value

TBHQ:

Tertiary butylhydroquinone

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Acknowledgements

SBM is grateful to Dr. Babasaheb Ambedkar National Research and Training Institute (BARTI) for financial support for the Ph.D. fellowship. JSW and PRG acknowledge the efforts of Mr. Harsh Jadhav for the assistance in the analysis related to DPPH activity and total polyphenol content.

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Correspondence to Parag R. Gogate.

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Authors have no conflict of interest to declare. Authors also declare that there is no funding that could have influenced the studies reported in the work.

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More, S.B., Gogate, P.R. & Waghmare, J.S. Bioactives from pomegranate peel and moringa leaves as natural antioxidants for stability of edible oil blends. Braz. J. Chem. Eng. 39, 527–538 (2022). https://doi.org/10.1007/s43153-021-00150-1

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  • DOI: https://doi.org/10.1007/s43153-021-00150-1

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