Abstract
A capillary zone electrophoretic method for the separation of positional isomers of phenylenediamine is presented. The phenylenediamines were baseline resolved using a fused-silica capillary. However, the analysis of samples containing both an excess of p-phenylenediamine and minor traces of the meta and ortho isomers, and also a high salt content, required a non-polar (DB-1) bonded phase in order to reduce the electroosmotic flow. The method can be used for purity testing of p-phenylene diamine and for the determination of impurities in hydrolysates of synthetic polymers.
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