DETECTION OF HYDRAZINE, METHYLHYDRAZINE, AND ISONIAZID BY CAPILLARY ELECTROPHORESIS WITH A PALLADIUM MODIFIED MICRODISK ARRAY ELECTRODE

A palladium particle-modified carbon fiber microdisk array electrode w as designed and employed in capillary electrophoresis for the simultan eous detection of hydrazine, methylhydrazine, and isoniazid. The Pd-mo dified microdisk electrode had high catalytic ability for hydrazines a nd exhibited good reproducibility and stability. The response for hydr azine was linear over 3 orders of magnitude with a correlation coeffic ient of 0.993. The detection limits far hydrazine, methylhydrazine, an d isoniazid were 1.2, 2.1, and 6.2 pg, respectively.