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Electrochemical study of degradation of natural dyes used in artworks
Sokolová, Romana ; Degano, I. ; Hromadová, Magdaléna
This work is focused on the electrochemical study of natural flavonoid dyes used in artworks. Electrochemical behaviour of hematoxylin was studied in 0.1 M KCl, phosphate buffers of pH 5 – 12 and in acetonitrile. The mechanism of oxidation and the stability of intermediates as a function of pH are discussed. The electrochemical techniques are combined with spectrophotometry, LC/DAD and GC-MS analysis in order to identify the degradation products.

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