Home | My Profile | Contact Us
Research Trends Products  |   order gateway  |   author gateway  |   editor gateway  
ID:
Password:
Register | Forgot Password

Author Resources
 Author Gateway
 Article submission guidelines

Editor Resources
 Editor/Referee Gateway

Agents/Distributors
 Regional Subscription Agents/Distributors
 
Current Topics in Analytical Chemistry   Volumes    Volume 10 
Abstract
Ferricyanide chronoamperometric total antioxidant capacity assay for green tea
Hideaki Nakamura, Yoshiteru Nakayama, Masao Gotoh
Pages: 29 - 34
Number of pages: 6
Current Topics in Analytical Chemistry
Volume 10 

Copyright © 2016 Research Trends. All rights reserved

ABSTRACT
 
In our previous study, we established a ferricyanide chronoamperometric total antioxidant capacity (FC-TAC) assay using a carbon screen-printed disposable microchip, and then the TAC value of vegetable extraction was estimated. In the present study, we further conducted the FC-TAC assay for green tea (Japanese tea), and the TAC value of the green tea was estimated using several extracting conditions for drinking and compared with the value obtained from an optical method using 2,2-diphenyl-1-picrylhydrazyl (DPPH). First, as a typical antioxidant contained in the green tea, the response to trolox, ascorbic acid, or catechin was investigated by the FC-TAC assay, and the results corresponded well with the results obtained using the conventional DPPH assay (r > 0.973). Next, real sample applications were examined in the FC-TAC assay using a total of 20 samples from four types of tea. The results of the present FC-TAC assay showed a relatively sensitive response to the antioxidants contained in the green tea as compared with the DPPH assay, and an acceptable correlation (r = 0.804) was obtained with a good slope of regression curve (y = 1.01x).
Buy this Article


 
search


E-Commerce
Buy this article
Buy this volume
Subscribe to this title
Shopping Cart

Quick Links
Login
Search Products
Browse in Alphabetical Order : Journals
Series/Books
Browse by Subject Classification : Journals
Series/Books

Miscellaneous
Ordering Information Ordering Information
Downloadable forms Downloadable Forms