Effects of Extraction Solvents on the Total Phenolic Content, Total Flavonoid Content, and Antioxidant Activity in the Aerial Part of Root Vegetables

Eman A. Mohammed, Ismat G. Abdalla, Mohammed A. Alfawaz, Mohammed A. Mohammed, Salah A. Al Maiman, Magdi A. Osman, Abu ElGasim A. Yagoub and Amro B. Hassan ()
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Eman A. Mohammed: Department of Food Science and Technology, Faculty of Agriculture, University of Khartoum, Khartoum North 13314, Sudan
Ismat G. Abdalla: Department of Food Science and Technology, Faculty of Agriculture, University of Khartoum, Khartoum North 13314, Sudan
Mohammed A. Alfawaz: Department of Food Science and Nutrition, Collage of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Mohammed A. Mohammed: Department of Food Science and Nutrition, Collage of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Salah A. Al Maiman: Department of Food Science and Nutrition, Collage of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Magdi A. Osman: Department of Food Science and Nutrition, Collage of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Abu ElGasim A. Yagoub: Department of Food Science and Nutrition, Collage of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Amro B. Hassan: Department of Food Science and Nutrition, Collage of Food and Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia

Agriculture, 2022, vol. 12, issue 11, 1-12

Abstract: The present study aimed to investigate the total phenolics, total flavonoids, and antioxidant activity in terms of the DPPH scavenging, reducing power, and H 2 O 2 scavenging of the aerial parts of onion, white radish, red radish, carrot, and beet as affected by different extraction solvents. Generally, the aerial part of these vegetables has high antioxidant properties. Samples were extracted with methanol (100 and 70%), ethanol (100 and 70%), and water. Total phenolic content was highest when the samples were extracted using 100% methanol, while extraction with 100% ethanol yielded the highest total flavonoids. The highest DPPH activity and H 2 O 2 scavenging values were obtained by extraction of the aerial plant parts with 70% ethanol, and the 70% methanol extract had the highest reducing power. Partial least regression (PLS) was performed to validate the optimum solvent for extraction of the antioxidants and their activity in each plant. The PLS indicated that there was a variation in the validation of the different extracts for each plant. The high antioxidant capacity of root vegetables, which is natural, indicates that they may have health and dietetic advantages for consumers.

Keywords: aerial parts; root vegetables; extraction solvents; phenolic compounds; antioxidant activity (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2022
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