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Journal of Applied Spectroscopy

, Volume 85, Issue 1, pp 21–26 | Cite as

Acid–Base Properties of Azo Dyes in Solution Studied Using Spectrophotometry and Colorimetry

  • D. V. Snigur
  • A. N. Chebotarev
  • K. V. Bevziuk
Article
  • 29 Downloads

Colorimetry and spectrophotometry with chemometric data processing were used to study the acid–base properties of azo dyes in aqueous solution. The capabilities of both methods were compared. Ionization constants of all the functional groups of the azo compounds studied could be determined relative to the change in the specific color difference depending on the acidity of the medium. The colorimetric functions of ion-molecular forms of azo compounds used as an analytical signal allow us to obtain complete information on the acid–base equilibrium in a wide acidity range.

Keywords

azo dyes colorimetry spectrophotometry ionization constants acid–base properties 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • D. V. Snigur
    • 1
  • A. N. Chebotarev
    • 1
  • K. V. Bevziuk
    • 1
  1. 1.I. I. Mechnikov Odessa National UniversityOdessaUkraine

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