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Published on: March 2, 2012
Use of ultrafiltration on the analysis of low molecular weight complexing molecules. Analysis of iminodiacetic acid
I Moreno-Villoslada1, E Quiroz, C Muñoz
1Chemistry Institute, Faculty of Sciences, Universidad Austral de Chile, Valdivia. imorenovilloslada@uach.cl
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.
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