Sensitive and Selective Pathway of Total Antioxidant Capacity in Commercially Lemon, Watermelon and Mango-pineapple Cold Teas by Square Wave Adsorptive Stripping Voltammetry

Year 2019, Volume: 32 Issue: 4, 1123 - 1136, 01.12.2019

Ersin Demır

https://doi.org/10.35378/gujs.490523

Cited By: 14

Abstract

The
present work describes a convenient method for the sensitive and selective
pathway of total antioxidant capacity (TAC) in lemon, watermelon and
mango-pineapple cold teas by square wave adsorptive stripping voltammetry
(SWAdSV) that is major electroanalytical methods on a carbon paste electrode.
Anodic peak current of p-coumaric acid exhibited a well oxidation peak at 780
mV was used as a standard to evaluate TAC in tea samples. In addition, the very
well-resolved and reproducible anodic processes, such as accumulation time,
frequency, step potential etc. were optimized for the SWAdSV method. The
potential applicability of the proposed SWAdSV was illustrated in commercial
teas samples. SWAdSV proved to be a faster and easier method to calculate TAC
compared to other conventional methods. Furthermore, total antioxidant amounts
of commercially lemon, watermelon and mango-pineapple cold teas were found in
optimum condition as equivalent to a concentration of 2050±15mg/L, 705±10 mg/L
and 808±14 mg/L p-coumaric acid (n=3, 95% confidence level), respectively.

Keywords

Antioxidant, Voltammetry, Tea, Electrochemistry

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