Issue 73, 2018

Ultrasonic-assisted enzymatic extraction of a water soluble polysaccharide from dragon fruit peel and its antioxidant activity

Abstract

A novel water soluble polysaccharide from dragon fruit peel named DFPWSP-1 was isolated and purified and chemical analysis was performed. The results indicated that DFPWSP-1, with an average molecular weight of 2.98 × 102 kDa, mainly contained galacturonic acid, glucose and galactose. Then, a Box–Behnken design (BBD) was employed to optimize the ultrasonic-assisted enzymatic extraction (UAEE) of DFPWSP-1. The optimal extraction conditions for the maximum yield of DFPWSP-1 were a cellulase volume of 104 U, an enzymolysis time of 2.06 h, an ultrasonication power of 105 W and a ratio of solution to sample of 8.5 mL g−1. Under these conditions, the extraction yield of DFPWSP-1 was 20.28%. Furthermore, the polysaccharide DFPWSP-1 exhibited a significant scavenging activity of 2-diphenyl-picrylhydrazyl (DPPH) radical, superoxide anion and hydroxyl radical. DFPWSP-1 may be a potential natural antioxidant in the food industry.

Graphical abstract: Ultrasonic-assisted enzymatic extraction of a water soluble polysaccharide from dragon fruit peel and its antioxidant activity

Article information

Article type
Paper
Submitted
31 Jul 2018
Accepted
03 Dec 2018
First published
18 Dec 2018
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2018,8, 42145-42152

Ultrasonic-assisted enzymatic extraction of a water soluble polysaccharide from dragon fruit peel and its antioxidant activity

S. Qian, X. Fang, D. Dan, E. Diao and Z. Lu, RSC Adv., 2018, 8, 42145 DOI: 10.1039/C8RA06449K

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