title: On the determination of the free concentration of ligands.
abstract: Working with a sufficient excess of any of the protonated forms of a ligand is shown to guarantee the validity of the determination of its free concentration when calculated by disregarding complexing effect. This result significantly extends the possibilities of studying the stability constants of co-ordination systems.
authors.affiliation: Departments of Analytical Chemistry and Physical Chemistry, University of La Laguna, 38204-La Laguna, Tenerife, Canary Islands, Spain.
authors.forename: J C
authors.initials: JC
authors.lastname: Placeres
authors.forename: M T
authors.initials: MT
authors.lastname: Alaejos
authors.forename: F J
authors.initials: FJ
authors.lastname: Montelongo