title: Mathematical treatment of absorbance versus pH graphs of polybasic acids.
abstract: Mathematical relationships determining the shape of absorbance vs. pH graphs of polybasic acids are derived, and new graphical and numerical techniques for evaluating the acidity constants of two-step overlapping equilibria are examined.
authors.affiliation: Department of Bromatology, Toxicology, and Applied Chemical Analysis, Faculty of Pharmacy, The University of Seville, 41012 Seville, Spain.
authors.forename: A G
authors.initials: AG
authors.lastname: Asuero
authors.forename: J L
authors.initials: JL
authors.lastname: Jimenez-Trillo
authors.forename: M J
authors.initials: MJ
authors.lastname: Navas