Schiff base formation in the development of a spectrophotometric assay for sulfonamides

John L. Colaizzi, John W. Boenigk, Alfred N. Martin, Adelbert M. Knevel

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


The reaction between aromatic amines and aromatic aldehydes was investigated as the basis of a spectrophotometric assay for sulfonamides. Those properties of the equilibrium reaction which affect the absorptimetric properties of the system were studied to evaluate the method. The effects of pH, ionic strength, concentration of aldehyde, solvent system, and temperature were determined. The method was applied to the determination of sulfanilamide, sulfadimethoxine, and succinylsulfathiazole, and comparative analyses were performed with the method of Bratton and Marshall. The low absorbance method of precision spectrophotometry was employed in the determination of microgram quantities of sulfanilamide.

Original languageEnglish (US)
Pages (from-to)564-568
Number of pages5
JournalJournal of Pharmaceutical Sciences
Issue number4
StatePublished - Apr 1965
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Pharmaceutical Science

Fingerprint Dive into the research topics of 'Schiff base formation in the development of a spectrophotometric assay for sulfonamides'. Together they form a unique fingerprint.

Cite this