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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...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Hindawi
2019
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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. |
format | Online Article Text |
id | pubmed-6378047 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | Hindawi |
record_format | MEDLINE/PubMed |
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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