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Interactions in iron gall inks
Jančovičová, V., Čeppan, M., Havlínová, B., Reháková, M. and Jakubíková, Z. Interactions in iron gall inks Chemical Papers, Vol.61, No. 5, 2007, 391-397
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Document type:
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Článok z časopisu / Journal Article |
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Collection:
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Chemical papers
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| Author(s) |
Jančovičová, V.
Čeppan, M.
Havlínová, B.
Reháková, M.
Jakubíková, Z.
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| Title |
Interactions in iron gall inks
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| Journal name |
Chemical Papers
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| Publication date |
2007
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| Year available |
2007
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| Volume number |
61
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| Issue number |
5
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| ISSN |
0366-6352
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| Start page |
391
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| End page |
397
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| Place of publication |
Poland
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| Publisher |
Versita
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| Collection year |
2007
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| Language |
english
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| Subject |
250000 Chemical Sciences
250500 Macromolecular Chemistry
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| Abstract/Summary |
Simple iron gall inks composed of gallic acid, ferrous sulfate, and gum arabic and in some cases also of copper(II) sulfate were prepared. The process of iron ion complex formation with gallic acid was investigated using UV-VIS spectroscopy, pH measurements, and by monitoring the concentration changes of Fe(II) ions. The admixture of Fe(II) ions to gallic acid induced a bathochromic shift of absorption bands at 215 nm and 265 nm in the UV-VIS spectra. Formation of a new absorbance band in the visible area was also observed and used to calculate the initial rate of complex formation. Concurrently, the pH values and the concentration of Fe(II) ions in the solution decreased. Gum arabic significantly enhanced the complex formation and its stability. On the contrary, the addition of Cu(II) ions to the solution decelerated the complex formation considerably.
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