title: Developments in indicators.
abstract: The use of metal ion-metallochromic indicator complexes as narrow-range pH indicators is shown to be advantageous for the titration of weak acids in aqueous media. The Cu-DBAH and the Mg-Azo Violet complexes with apparent pK values of 7.7 and 11.5 have been used for the titrations of benzoic acid and of glycine and phenol, respectively, with good precision.
authors.affiliation: Nitrokémia Works Füzfögyártelep Hungary.
authors.forename: L
authors.initials: L
authors.lastname: Légrádi