The Generalized Standard Addition Method: Intermetallic Interferences in Anodic Stripping Voltammetry

摘要

A barrier to routine application of anodic stripping voltammetry is the possible formation of intermetallic compounds which can lead to significant errors in the estimated analyte concentrations. As the well known method of standard additions can correct only for matrix effects it is powerless to correct for intermetallic interferences which are not matrix effects. By changing the experimental design, the new Generalized Standard Addition Method (GSAM) can simultaneously characterize and correct for this type interference as well as matrix effects expected for real samples. The method is tested on the Cu-Zn-Hg system and error estimates are provided for calculated linear response constants and analyte concentrations. (Author)