Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7585302 | Food Chemistry | 2018 | 8 Pages |
Abstract
A single-step, rapid (10â¯min), sensitive silver nanoparticles (AgNPs) based spectrophotometric method for antioxidant capacity (AOC) assay has been developed. The assay is based on the ability of natural polyphenols to reduce Ag(I) and stabilize the produced AgNPs(0) at room temperature. Localized surface plasmon resonance (LSPR) of AgNPs at â420â¯nm is then measured. Using different conditions of pH (8.4) and temperature (45â¯Â°C) a further assay based on the production of AgNPs with selectivity for flavonols was also developed. The reactivity of the two AgNPs based assays vs. 15 polyphenols belonging to different chemical classes and 9 different samples has been studied and compared with ABTS, Folin and AuNPs based methods for AOC. The proposed assays had good reproducibility (RSDâ¯â¤â¯13) and are simple, sensitive and cost effective. Moreover, used in conjunction with the classical AOC assays, can improve the information on the polyphenolic pool of food samples.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Flavio Della Pelle, Annalisa Scroccarello, Manuel Sergi, Marcello Mascini, Michele Del Carlo, Dario Compagnone,