title: Use of ultrafiltration on the analysis of low molecular weight complexing molecules. Analysis of iminodiacetic acid at constant ionic strength.
abstract: Low molecular weight complexing molecules may be indirectly analyzed by ultrafiltration with the aid of a water-soluble polymer. The theory concerned is developed and the analysis of iminodiacetic acid (IDAA) is performed by ultrafiltration of aqueous solutions containing poly(sodium-4-styrenesulfonate) (PSS), Cu(NO3)2, and IDAA in variable concentrations. The technique allows measuring IDAA in a range of concentrations between 10(-4) M and 10(-5) M when a 1.6 x 10(-4) M Cu2+ solution is ultrafiltered in the presence of PSS and IDAA.
authors.affiliation: Chemistry Institute, Faculty of Sciences, Universidad Austral de Chile, Valdivia. imorenovilloslada@uach.cl
authors.forename: I
authors.initials: I
authors.lastname: Moreno-Villoslada
authors.forename: E
authors.initials: E
authors.lastname: Quiroz
authors.forename: C
authors.initials: C
authors.lastname: Muñoz
authors.forename: B L
authors.initials: BL
authors.lastname: Rivas