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Optical Ascorbic Acid Sensor Based on the Fluorescence Quenching of Silver Nanoparticles by Hyun Woo Park; Seikh Mafiz Alam; Sang Hak Lee; Mohammad Mainul Karim; Saikh Mohammad Wabaidur; Meea Kang; Jong Ha Choi is a Materials Science article available to read on EtoBox.

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## Abstract A sensitive and selective fluorimetric sensor for the assay of ascorbic acid (AA) using silver nanoparticles as emission reagent was investigated. In this study, silver nanoparticles were prepared based on aqueous–gaseous phase reaction of silver nitrate solution and ammonia gas. The nanoparticles were water‐soluble, stable and had a narrow emission band. They were used as a fluorescence probe for the assay of ascorbic acid on its quenching effect on the emission of silver nanoparticles. The principal reason for quenching is likely to be a complexation between ascorbic acid and silver nanoparticles. The quenching mechanism was established by Stern–Volmer law. Under the optimum conditions, the quenched fluorescence intensity was linear with the concentration of ascorbic acid in the range of 4.1 × 10^−6^ to 1.0 ×10^−4^m (__r__= 0.9985) with a detection limit of 1.0 × 10^−7^m. The RSD for repeatability of the sensor for the assay of ascorbic acid concentration of 3.0 × 10^−5^ and 4.0 × 10^−6^m was found to be 1.5 and 1.3%, respectively. The proposed method was applied to the determination of ascorbic acid in vegetables and vitamin C tablets. Copyright © 2009 John Wiley & S

Who reads Optical Ascorbic Acid Sensor Based on the Fluorescence Quenching of Silver Nanoparticles?

Author

Hyun Woo Park; Seikh Mafiz Alam; Sang Hak Lee; Mohammad Mainul Karim; Saikh Mohammad Wabaidur; Meea Kang; Jong Ha Choi

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 1522-7235)

Published

2009

Language

EN

Field

Materials Science (Physical Sciences)