Facile simultaneous electrochemical determination of codeine and acetaminophen in pharmaceutical samples and biological fluids by graphene–CoFe2O4 nancomposite modified carbon paste electrode

Simultaneous electrochemical sensing of thallium, lead and mercury using a novel ionic liquid/graphene modified electrode

“…Gr exhibits excellent electron transfer promoting ability for some species and excellent catalytic behaviour toward small bio/molecules, which makes Gr extremely attractive for electrochemical sensors [32,33]. CMEs based on Gr take advantages of the increased electrode surface area, mass-transport rate and fast electron transfer compared to electrodes based on bulk materials between other factors [34,35].…”

Evaluation of the degradation of acetaminophen by the filamentous fungus Scedosporium dehoogii using carbon-based modified electrodes

“…Figure 2 depicts the CV responses from the electrochemical oxidation of 75 mg L −1 APAP in 0.1 M PBS pH 7.4 at p-NiTSPc-CFME (curve a) and at CH-CPE (curve b). As shown, the anodic peak potential for APAP oxidation at p-NiTSPc-CFME was observed around 0.42 V vs. SCE, followed by a weak reduction peak around 0.0 V; whereas at CH-CPE, the oxidation peak potential was about 0.49 V, followed by a second reduction peak, very weak, around -0.05 V. Both peaks of each curve are associated with a redox process corresponding to the oxidation of APAP that led to N-acetyl-para-benzoquinone imine (NAPQI) [45][46][47]. The peak current density (J p ) obtained at CH-CPE was higher than that obtained at pNiTSPc-CFME.…”

Fast and sensitive determination of doxorubicin using multi-walled carbon nanotubes as a sensor and CoFe2O4 magnetic nanoparticles as a mediator

“…The enhancement of oxidation current is also related to good electrocatalytic property of CoFe 2 O 4 , which facilitates the effect of electron transfer between solution and electrode interface. In fact, with an inverse spinel structure, Cobalt ferrite (CoFe 2 O 4 ) shows ferrimagnetism property that originates from magnetic moment of anti-parallel spins between Fe 3+ ions at tetrahedral sites and Co 2+ ions at octahedral sites, and its composite with MWCNTs can improve carbon nanotube characteristics [19].…”

“…Among MNPs, cubic-spinel-structure CoFe 2 O 4 has been widely studied because of its being inexpensive to produce, excellent chemical stability, high electromagnetic performance, mechanical hardness, biocompatible, environmentally safe and Electronic supplementary material The online version of this article (doi:10.1007/s00604-015-1588-3) contains supplementary material, which is available to authorized users. promising catalytic activity [18,19]. In the present work, a new carbon paste electrode, modified with CoFe 2 O 4 nanoparticles and multi-walled carbon nanotubes (MWCNT/ CoFe 2 O 4 /CPE), is constructed and used for the sensitive electrochemical determination of trace amounts of the DOX using differential pulse voltammetry.…”