of antimony complexes using different complexing agents with
a HMDE electrode [9–11].
Screen-printed electrodes are planar devices with plastic
substrates that are coated with layers of electroconductive
and insulating inks at a controlled thickness. The advent of
screen-printed (thick-film) technology has made it possible to
mass-produce inexpensive disposable electrodes for use with
electrochemical instruments [12–16].
The great versatility of screen-printed electrodes resides in
their wide range of possible modifications. In fact, the composition
of the inks used in the printing process can be modified
by the addition of substances of a very different nature, such as
metals, enzymes, polymers, complexing agents, etc. Moreover,
the possibility also exists of modifying the electrodes once they
have been fabricated through the deposition of films containing
those substances. Screen-printed electrodes, modified with
Hg-based films [17,18] have been shown to be highly effective
in the analysis of different metals. However, the toxicity of this
element has led different authors to use other elements such
as bismuth in order to modify carbon screen-printed electrodes