MIGRATION BEHAVIOR AND SEPARATION OF AROMATIC TRIAZOLE AND THIAZOLE COMPOUNDS BY CAPILLARY ZONE ELECTROPHORESIS

The separation by capillary zone electrophoresis (CZE) of aromatic tri azole and thiazole compounds, including benzotriazole (BTA), 5-tolyltr iazole (5-TTA), dimethylbenzotriazole (DBTA), and 2-mercaptobenzothiaz ole (MET), is described. These compounds, widely used as inhibitors of copper corrosion, were effectively separated using a fused-silica cap illary with phytic acid (10 mM) as background electrolyte at pH above 8, except for pH of about 9.24 at which BTA and MBT migrate together. The migration behavior of these four analytes was investigated and the ir pK(a) values were determined by CZE. This method was successfully a pplied to the analysis of a commercial product.