A method for the identification of the products from controlled-potential coulometry of p-nitrosophenol, p-nitrophenol, p-(p-hydroxyphenylazo) benzenesulfonic acid sodium salt

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Franklin Aubrey Thacker (Creator)
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/
Harvey Herman

Abstract: The aim of this study was to identify the controlled-potential coulometry products after electrolytic reduction of p-nitrosophenol, p-nitrophenol, p-(p-hydroxyphenylazo)- benzenesulfonic acid sodium salt, Orange I, and Orange II. Polarography was performed on all individual compounds in two buffer solutions at pH 4.9 and 11.8 using the dropping mercury electrode polarographic circuit. The resulting polarograms were used to select the controlled working electrode potentials for coulometry. Coulometry was conducted with the individual compounds and each pH buffer solution in a stirred mercury pool coulometry cell. The potential was controlled and the number of electrons (n) involved in the reduction process was determined with the aid of an electrical circuit whose output voltage was proportional to n. The coulometric reaction solutions were evaporated and the product residues were treated with silylating reagent to form silyl derivatives. The silyl derivatives increased product volatilities so that identification by gas chromatography was possible.

Additional Information

Language: English
Date: 1976
Electrochemical analysis
Electrolytic reduction

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