Spectrophotometric and potentiometric study of the acid—base equilibria of indophenols in aqueous media |
| |
Authors: | RA Patrick G Svehla |
| |
Institution: | Department of Analytical Chemistry, The Queen''s University of Belfast BT9 5AG Northern Ireland |
| |
Abstract: | Six indophenols, with redox and acid—base indicator properties, have been examined by spectrophotometric and potentiometric methods. By analysing the absorption spectra obtained at different pH values, three independent values were obtained for their KOx dissociation constants, which are closely related to their properties as acid—base indicators. Three of the indophenols have also been examined by acid—base and redox potentiometric titrations. All KOx and E° values agree well with polarographic values. The use of these substances as visual acid—base and redox indicators is discussed. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|