title: TRIEN and TETREN as titrants in potentiometry with a silver indicator electrode.
abstract: The possibility of application of triethylenetetramine (TRIEN) and tetraethylenepentamine (TETREN) in metal titrations with the silver electrode as indicator was investigated. Copper, cadmium and zinc were determined in the presence of calcium, magnesium, aluminium and iron(III) in the concentration range from 0.02 to 2mM. The errors did not exceed 1%. On a similar basis copper and iron may be successfully determined in their mixtures under carefully controlled conditions. Copper is titrated with TRIEN, and both metals with EDTA at pH 7.5-8.0 in sulphosalicylate medium. The results obtained were in good agreement with those theoretically predicted.
authors.affiliation: Institute of Fundamental Problems in Chemistry, University of Warsaw, Warsaw, Poland.
authors.forename: A
authors.initials: A
authors.lastname: Hulanicki
authors.forename: M
authors.initials: M
authors.lastname: Trojanowicz
authors.forename: J
authors.initials: J
authors.lastname: Domanska