title: Sensitive tests for nitrite through azo-dye formation.
abstract: The diazonium cation resulting from the interaction of nitrite with sulphanilic acid is coupled with pyridinols to give red azo-dyes. Compared to many other colour reactions employed for detection of nitrite, the present systems afford greater sensitivity. Many ions do not affect the colour; thus detection and determination are selective. The method is applied in determination of nitrite in water samples.
authors.affiliation: Department of Chemistry, University of Delhi, Delhi 110007, India.
authors.forename: B S
authors.initials: BS
authors.lastname: Garg
authors.forename: Y L
authors.initials: YL
authors.lastname: Mehta
authors.forename: M
authors.initials: M
authors.lastname: Katyal