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Kinetic-photometric monitoring of the formation of MnO2 nanoparticles and their application to the determination of iodide

Citation

March, JG and Maya Alejandro, F and Cerda, V, Kinetic-photometric monitoring of the formation of MnO2 nanoparticles and their application to the determination of iodide, Microchimica Acta, 183, (12) pp. 3127-3134. ISSN 0026-3672 (2016) [Refereed Article]

Copyright Statement

Copyright 2016 Springer-Verlag Wien

DOI: doi:10.1007/s00604-016-1966-5

Abstract

We describe a method for kinetic-spectrophotometric monitoring of the formation of MnO2 nanoparticles (NPs) by reduction of permanganate ion. Iodide was selected as a model analyte. The NPs were characterized by atomic force microscopy, transmission electron microscopy, powder x-ray diffraction, energy-dispersive x-ray spectroscopy, Fourier transform infrared spectroscopy and nitrogen physisorption surface area analysis. The change in absorbance at 415 nm over time serves as the analytical signal, and experimental variables that affect the slope have been studied. The slope is linearly related to iodide concentrations in the range from 0.2 to 3 μg⋅mL‾1, and the limits of detection and quantification are 0.05 and 0.17 μg⋅mL‾1, respectively. The intraday and interday precision (given as relative standard deviations for n = 5) are 1.4 and 3 %, respectively. The method has been successfully applied to the determination of iodide in a pharmaceutical product. In our perception, this is the first model where the monitoring of the early stages of the formation of NPs has been exploited as analytical signal.

Item Details

Item Type:Refereed Article
Keywords:nanoparticle growth, kinetic methods
Research Division:Chemical Sciences
Research Group:Analytical Chemistry
Research Field:Analytical Chemistry not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Chemical Sciences
UTAS Author:Maya Alejandro, F (Mr Fernando Maya Alejandro)
ID Code:127843
Year Published:2016
Web of Science® Times Cited:1
Deposited By:Chemistry
Deposited On:2018-08-19
Last Modified:2018-09-12
Downloads:0

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