title: Direct determination of zinc in insulin preparations by differential pulse polarography.
abstract: A rapid and direct differential pulse polarographic method for the determination of zine in insulin preparations is described. Optimum conditions were studied using 0.2 M acetate buffer (pH 4.1) as the supporting electrolyte. Agreement between the results by direct analysis and those by the procedure involving pressurized digestion was satisfactory.
authors.affiliation: Departamento de Físico-Química y Técnicas Instrumentales, Facultad de Farmacia, Universidad Complutense, 28040 Madrid, Spain.
authors.forename: L L
authors.initials: LL
authors.lastname: Lewin
authors.forename: P
authors.initials: P
authors.lastname: Sanz Pedrero
authors.forename: M R
authors.initials: MR
authors.lastname: Vilariño