Abstract
A detailed investigation has been carried out to elucidate the electrode and solution phenomena that produce two discrete polarographic reduction waves when the azo dye, solochrome violet RS (5-sulfo-2-hydroxybenzene-azo-2-naphthol), is complexed with metals. Previous explanations put forward to explain the polarographic activity of di-o-hydroxyazo compounds towards certain metals were shown to be invalid. It is proposed that the half-wave potential shift (ΔE1/2) results from the metal remaining bonded to the reduced form of the dye (hydrazo derivative), the potential of the DME being controlled by the metal-azo/metal-hydrazo redox couple. The ΔE1/2-values are then independent of pH and metal concentration, and depend only on the relevant stability constants and acid dissociation constants.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
