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Study of Complexes of Tannic Acid with Fe(III) and Fe(II)

UV-Vis absorption spectra of tannic acid were gained at pH 1.0∼9.0. Due to the pH value dependence of complex, the stoichiometry of tannic acid with iron ions was tested in buffer solution by the mole ratio method. The result suggests that the complex ratio of tannic acid to Fe(III) is 1 : 1 and to...

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Autores principales: Fu, Zhaofeng, Chen, Rui
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6378047/
https://www.ncbi.nlm.nih.gov/pubmed/30863653
http://dx.doi.org/10.1155/2019/3894571
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author Fu, Zhaofeng
Chen, Rui
author_facet Fu, Zhaofeng
Chen, Rui
author_sort Fu, Zhaofeng
collection PubMed
description UV-Vis absorption spectra of tannic acid were gained at pH 1.0∼9.0. Due to the pH value dependence of complex, the stoichiometry of tannic acid with iron ions was tested in buffer solution by the mole ratio method. The result suggests that the complex ratio of tannic acid to Fe(III) is 1 : 1 and to Fe(II) 3 : 1 in the carbonate buffer solution, and the complex ratio of iron-tannic complexes is 1 : 1 at pH 2.2. Due to the different color changes of tannic acid with iron ions in the coordination reactions, a tannic acid test paper was designed. The concentrations of Fe(III) more than 5.000 × 10(−6) mol/L and the concentrations of Fe(II) more than 1.000 × 10(−5) mol/L in aqueous solution can be detected by this test paper.
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spelling pubmed-63780472019-03-12 Study of Complexes of Tannic Acid with Fe(III) and Fe(II) Fu, Zhaofeng Chen, Rui J Anal Methods Chem Research Article UV-Vis absorption spectra of tannic acid were gained at pH 1.0∼9.0. Due to the pH value dependence of complex, the stoichiometry of tannic acid with iron ions was tested in buffer solution by the mole ratio method. The result suggests that the complex ratio of tannic acid to Fe(III) is 1 : 1 and to Fe(II) 3 : 1 in the carbonate buffer solution, and the complex ratio of iron-tannic complexes is 1 : 1 at pH 2.2. Due to the different color changes of tannic acid with iron ions in the coordination reactions, a tannic acid test paper was designed. The concentrations of Fe(III) more than 5.000 × 10(−6) mol/L and the concentrations of Fe(II) more than 1.000 × 10(−5) mol/L in aqueous solution can be detected by this test paper. Hindawi 2019-02-03 /pmc/articles/PMC6378047/ /pubmed/30863653 http://dx.doi.org/10.1155/2019/3894571 Text en Copyright © 2019 Zhaofeng Fu and Rui Chen. http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Fu, Zhaofeng
Chen, Rui
Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
title Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
title_full Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
title_fullStr Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
title_full_unstemmed Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
title_short Study of Complexes of Tannic Acid with Fe(III) and Fe(II)
title_sort study of complexes of tannic acid with fe(iii) and fe(ii)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6378047/
https://www.ncbi.nlm.nih.gov/pubmed/30863653
http://dx.doi.org/10.1155/2019/3894571
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