n the present paper, the use of a carbon paste electrode modified by ferrocene monocarboxylic
acid (FMC) and carbon nanotubes prepared by a simple and rapid method was
described. The modified electrode showed an excellent character for electrocatalytic oxidization
of phenylhydrazine (PHZ) and hydrazine (HZ) with a 300 mV separation of both
peaks. Differential pulse voltammetric peak currents of PHZ and HZ increased linearly
with their concentrations at the range of 0.8 mM to 700 mM and 16 mM to 800 mM and
the detection limits (3r) were determined to be 0.42 mM and 14 mM, respectively.
