ANALYSIS OF DISPARATE LEVELS OF ANIONS OF RELEVANCE TO CORROSION PROCESSES

The application of an analysis approach which combines matrix matching of electrolyte with sample with direct UV detection for anion analysi s of low levels (ppm) of some anions in the presence of large levels ( on the order of 1 M) of chloride or sulfate is reported. By replacing the standard chromate electrolyte with one based on the dominant anion (e.g., NaCl), a matrix match for the anion is achieved. The developme nt of the method and the effects of the concentration of the electroos motic flow modifier on the selectivity of the analysis are described. In addition, the application of the method to several corrosion studie s is presented.