title: 2-(3'-sulphobenzoyl)pyridine thiosemicarbazone and phenyl thiosemicarbazone as spectrophotometric analytical reagents.
abstract: The synthesis, characteristics, properties and metal-ion interactions of 2-(3'-sulphobenzoyl)-pyridine thiosemicarbazone and phenyl thiosemicarbazone have been studied. These substances exhibit three pK values in aqueous solution, and form water-soluble chelates with high molar absorptivities, which may be used in analysis, especially the iron(II) chelates (lambda(max) 620-630 nm). The behaviour of the iron-reagent systems has been investigated.
authors.affiliation: Department of Applied Chemical Analysis, Faculty of Pharmacy, University of Seville, Seville-4, Spain.
authors.forename: J M
authors.initials: JM
authors.lastname: Rodriguez
authors.forename: J M
authors.initials: JM
authors.lastname: Pavon