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

Document type: Článok z časopisu / Journal Article
Collection: Chemical papers  

Author(s) Jančovičová, V.
Čeppan, M.
Havlínová, B.
Reháková, M.
Jakubíková, Z.
Title Interactions in iron gall inks
Journal name Chemical Papers
Publication date 2007
Year available 2007
Volume number 61
Issue number 5
ISSN 0366-6352
Start page 391
End page 397
Place of publication Poland
Publisher Versita
Collection year 2007
Language english
Subject 250000 Chemical Sciences
250500 Macromolecular Chemistry
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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Created: Wed, 17 Mar 2010, 13:10:50 CET by Iveta Drtilová . Detailed History