Separation of polyphenol rich fraction from dried ginger rhizomes.

Ismail, R. Kubra and Jagan Mohan Rao, L. (2012) Separation of polyphenol rich fraction from dried ginger rhizomes. Journal of Applicable Chemistry, 1 (3). pp. 368-375.

Preview

PDF Journal of Applicable Chemistry, 2012, 1 (3) 368-375.pdf - Published Version Download (395kB) | Preview

Abstract

Ginger is the rhizome of Zingiber officinale Roscoe. Phenolic compounds are the major constituents of ginger, and possess health-promoting effects. The effects of different solvents of varying polarities on the extraction efficiency and total polyphenols (TPP) content were evaluated. Also, the antioxidant activity of the extracts was evaluated using radical scavenging assay, reducing power, and antioxidant capacity. The yield of the extract increased with increase in the polarity and dielectric constant of the respective solvent used. However, highest yield (16.5%) and greater release of total polyphenol content (TPP, 1.10% GAE) was obtained with 50% aqueous ethanol, due to its higher dielectric constant. Since, aqueous ethanol being considered as green and cheaper solvent compared to all other solvents used for the extraction, it may find application as a supplement in various food as well as pharmaceutical formulations / products.

Item Type:	Article
Uncontrolled Keywords:	Zingiber officinale, polyphenols, antioxidant, extraction
Subjects:	600 Technology > 08 Food technology > 30 Spices/Condiments 600 Technology > 08 Food technology > 32 Antioxidants
Divisions:	Plantation Products Spices and Flavour Technology
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	06 Dec 2012 05:44
Last Modified:	06 Dec 2012 05:44
URI:	http://ir.cftri.res.in/id/eprint/11063

Actions (login required)

View Item