title: Utilizing of Ag@AgCl@graphene oxide@Fe3O4 nanocomposite as a magnetic plasmonic nanophotocatalyst in light-initiated H2O2 generation and chemiluminescence detection of nitrite.
abstract: A simple and sensitive chemiluminescence (CL) procedure was developed for the quantification of nitrite in aqueous solutions. The method is based on light-initiated generation of H2O2 by a magnetic Ag@AgCl@Graphene oxide nanocomposite and its subsequent redox reaction with nitrite ion in acidic medium. During the carbonate-catalyzed decomposition of produced peroxynitrite and energy transferring to uranine, a CL emission was observed at λ=534n m. Several factors affecting the CL intensity were investigated and optimized. Under optimum conditions, the CL intensity was directly proportional to the nitrite concentration in the range of 5-200 ng mL(-1). The limit of detection and relative standard deviation (for n=5; at a nitrite concentration of 70 ng mL(-1)) were 1.15 ng mL(-1) and 2.57%, respectively. The method was successfully applied to determine nitrite in food stuffs with recoveries in the range of 95.0-103.0% for the spiked samples. The accuracy of the method was evaluated by comparing the results with those obtained by analyzing the samples using a standard method.
authors.affiliation: Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, 35 Km Tabriz-Marageh Road, P.O. Box 53714-161, Tabriz, Iran. Electronic address: h.abdol@azaruniv.edu.
authors.forename: Hossein
authors.initials: H
authors.lastname: Abdolmohammad-Zadeh
authors.affiliation: Department of Chemistry, Faculty of Sciences, Azarbaijan Shahid Madani University, 35 Km Tabriz-Marageh Road, P.O. Box 53714-161, Tabriz, Iran.
authors.forename: Elaheh
authors.initials: E
authors.lastname: Rahimpour
keywords: Chemiluminescence; Light-initiated H(2)O(2) generation; Magnetic nanocomposite; Nitrite; Plasmonic nanophotocatalyst