N-hexyl-3-methylimidazolium hexafluoro phosphate/multiwall carbon nanotubes paste electrode as a biosensor for voltammetric detection of morphine

Authors: Ali A Ensafi, Maedeh Izadi, B Rezaei, Hassan Karimi-Maleh

Publication date: 2012/7/31

Journal name: Journal of Molecular Liquids

Publisher: Elsevier

A carbon paste electrode modified with multiwall carbon nanotubes (MWNTs) and room-
temperature ionic liquid, n-hexyl-3-methylimidazolium hexafluoro phosphate was prepared.
The electrochemistry of morphine at the surface of the modified electrode was studied using
cyclic voltammetry, chronoamperometry, and electrochemical impedance spectroscopy
(EIS). The cyclic voltammogram showed an irreversible oxidation peak at 0.48 V (vs.
Ag/AgClsat), which corresponded to the oxidation of morphine. Compared to common ...