Electrochemical Sensor Based on a Carbon Veil Modified by Phytosynthesized Gold Nanoparticles for Determination of Ascorbic Acid

Author:

Brainina Khiena Z.ORCID,Bukharinova Maria A.,Stozhko Natalia Yu.,Sokolkov Sergey V.,Tarasov Aleksey V.ORCID,Vidrevich Marina B.

Abstract

An original voltammetric sensor (Au-gr/CVE) based on a carbon veil (CV) and phytosynthesized gold nanoparticles (Au-gr) was developed for ascorbic acid (AA) determination. Extract from strawberry leaves was used as source of antioxidants (reducers) for Au-gr phytosynthesis. The sensor was characterized by scanning electron microscopy, energy-dispersive X-ray spectroscopy and electrochemical methods. Optimal parameters of AA determination were chosen. The sensor exhibits a linear response to AA in a wide concentration range (1 μM–5.75 mM) and a limit of detection of 0.05 μM. The developed sensor demonstrated a high intra-day repeatability of 1 μM AA response (RSD = 1.4%) and its stability during six weeks, selectivity of AA determination toward glucose, sucrose, fructose, citric, tartaric and malic acids. The proposed sensor based on Au-gr provides a higher sensitivity and a lower limit of AA detection in comparison with the sensor based on gold nanoparticles synthesized by the Turkevich method. The sensor was successfully applied for the determination of AA content in fruit juices without samples preparation. The recovery of 99%–111% and RSD no more than 6.8% confirm the good reproducibility of the juice analysis results. A good agreement with the potentiometric titration data was obtained. A correlation (r = 0.9867) between the results of AA determination obtained on the developed sensor and integral antioxidant activity of fruit juices was observed.

Publisher

MDPI AG

Subject

Electrical and Electronic Engineering,Biochemistry,Instrumentation,Atomic and Molecular Physics, and Optics,Analytical Chemistry

Reference58 articles.

1. Contact hybrid potentiometric method for on-site and in situ estimation of the antioxidant activity of fruits and vegetables

2. Determination of vitamin C (ascorbic acid) contents in various fruit and vegetable by UV-spectrophotometry and titration methods;Al Majidi;J. Chem. Pharm. Sci.,2016

3. Comparison between titrimetric and spectrophotometric methods for quantification of vitamin C

4. Spectrophotometric Determination of L-Ascorbic Acid in Pharmaceuticals Based on Its Oxidation by Potassium Peroxymonosulfate and Hydrogen Peroxide

5. Comparison of vitamin C content in citrus fruits by titration and high performance liquid chromatography (HPLC) methods;Fatin Najwa;Int. Food Res. J.,2017

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