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http://dx.doi.org/10.3746/pnf.2016.21.4.355

Multiresponse Optimization and Prediction of Antioxidant Properties of Aqueous Ginger Extract  

Makanjuola, Solomon Akinremi (Department of Food Science and Technology, The Federal University of Technology)
Enujiugha, Victor Ndigwe (Department of Food Science and Technology, The Federal University of Technology)
Omoba, Olufunmilayo Sade (Department of Food Science and Technology, The Federal University of Technology)
Publication Information
Preventive Nutrition and Food Science / v.21, no.4, 2016 , pp. 355-360 More about this Journal
Abstract
The influence of extraction temperature, powder concentration, and extraction time on the antioxidant properties of aqueous ginger extract was investigated. The possibility of estimating the antioxidant properties of the extract from its absorbance and colour properties was also investigated. Results indicated that powder concentration was the most significant factor to consider in optimizing antioxidant extraction. However, temperature and time still influenced the 2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) radical scavenging activity while extraction temperature influenced the 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity of the extract. Using the total phenol content, total flavonoid content, ABTS radical scavenging activity, and DPPH radical scavenging activity of the extract, the multiresponse optimization condition for extraction of antioxidant based on the experimental range studied is $96^{\circ}C$, 2.10 g/100 mL, and 90 min. The absorbance of the ginger extract at 610 nm could be exploited for rapid estimation of its total flavonoid and polyphenol with a $R^2$ of 0.713 and 0.753, respectively.
Keywords
ginger; aqueous extraction; antioxidants; response surface; multivariate regression;
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Times Cited By KSCI : 1  (Citation Analysis)
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