Poly(vinyl alcohol) capped silver nanoparticles for antioxidant assay based on seed-mediated nanoparticle growth

Talanta
S TeerasongD Nacapricha

Abstract

A simple and rapid method for measurement of total antioxidant capacity (TAC) was developed. In this work, gallic acid was used as the antioxidant standard. Poly(vinyl alcohol) embedded silver nanoparticles (PVA-AgNPs) were employed as a colorimetric sensor. The detection principle was based on the seed-mediated nanoparticle growth technique. The PVA-AgNPs act as a catalyst in the reduction of Ag+by gallic acid by providing nucleation seeds. Ag+was reduced to Ag° and accumulated on the PVA-AgNP surface, leading to an increase in the size of particles. The absorbance of the colloidal solution was drastically enhanced with a small red shift. Under optimal conditions, a linear response was established between the change in absorbance and the TAC value expressed in terms of gallic acid equivalents. The linear range was from 25 to 200μM with a detection limit of 22.1μM. Satisfactory precision was obtained with % relative standard deviation (RSD) of 2.17. The developed sensor was successfully applied for TAC assessment of commercial ginger products. The PVA-AgNP sensor offers rapid analysis (within 5min) compared to other nanoparticle-based antioxidant assays. Synthesis of the particles and assay involved less-toxic chemicals, and is...Continue Reading

Citations

Jul 22, 2018·Current Medicinal Chemistry·Igor PanticSandor Kasas
Oct 20, 2018·Foods·Fatima Mustafa, Silvana Andreescu
Jan 1, 2020·Antioxidants·Ibrahim KhalilAli Seyfoddin
Apr 15, 2020·Mikrochimica Acta·Annalisa ScroccarelloDario Compagnone
Nov 11, 2020·Analytical Methods : Advancing Methods and Applications·Reşat ApakSelen Durmazel
Feb 21, 2021·Journal of the Science of Food and Agriculture·Denise B PistonesiValeria Springer

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