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Colorimetric investigation of the reaction between p ‐phenylendiamine and meta ‐substituted derivatives of benzene on a model support
Author(s) -
Scalzo M.,
Strati M.,
Casadei M. A.,
Cerreto F.,
Cesa S.
Publication year - 2010
Publication title -
international journal of cosmetic science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 62
eISSN - 1468-2494
pISSN - 0142-5463
DOI - 10.1111/j.1468-2494.2010.00577_5.x
Subject(s) - benzene , substrate (aquarium) , reagent , hydrogen peroxide , chemistry , pigment , reflectivity , colorimetry , reaction conditions , benzene derivatives , chromatic scale , combinatorial chemistry , photochemistry , organic chemistry , chromatography , catalysis , optics , biochemistry , chemical synthesis , oceanography , physics , in vitro , geology
J. Cosmet. Sci.,60 , 429–436 (July/August 2009) Synopsis The aim of this work was the employment of colorimetric techniques in the analysis of the color formed, on a proteic substrate, by the reaction between p ‐phenylendiamine and some meta ‐substituted benzene derivatives in the presence of hydrogen peroxide and in media at different pH values. In particular we investigated the chromatic variations that take place on the substrate in dependence on different reaction conditions. The obtained results show that for each couple of reagents the colorimetric data, namely the reflectance of the formed color, change considerably with the pH of the reaction medium and demonstrate how this parameter can be considered a good descriptor of the composition of the formed pigment.