Application of a thin film of poly(solochrome black T) as a redox mediator for the electro-catalytic simultaneous determination of dopamine and acetaminophen in the pharmaceutical and biological samples

Magnetism-assisted modification of screen printed electrode with magnetic multi-walled carbon nanotubes for electrochemical determination of dopamine

“…Notably, the slope of the equation for the oxidation peak was larger than that of the reduction peak, indicating that the electrode modified by mMWCNTs possessed a higher electrocatalytic activity toward the oxidation process than to the reduction process [43]. In addition, the surface concentration (Γ) of DA on the surface of mMWCNTs/SPE could be estimated by using the following equation [24]: (2) where Ip is the peak current, F the Faraday, R the universal gas constant, and T the Kelvin temperature. In the experiment, A was 0.089 cm 2 as obtained above, and the electron transfer number involved in DA oxidation is 2 [44].…”

“…For example, in the straightforward manual modified carbon paste electrode (MCPE) preparation process involving the grind of the modifier (carboxylated CNTs or CNT-based materials), the graphite powder and the binder (paraffin oil or silicone oil), it is difficult to distribute the modifier homogenously in the MCPE, and the refreshment process is time consuming [21]. On the other hand, casting method usually used for the preparation of glass carbon electrode (GCE) [22] and screen printed electrode (SPE) modification [23] presents the disadvantages of tedious operating procedure including electrode pretreatment, electrode modification and electrode refreshment, the difficulty in controlling the thickness and homogeneity of modifier films, and the weak physical stability of the modified electrodes [24]. Recently, Fe3O4 magnetic nanoparticles (MNPs) have exhibited promising potential for application in magnetic separation, target drug delivery, sensing and imaging for the superparamagnetism property [25][26][27][28].…”

A Facile Fabrication of Poly‐ethionine Film on Glassy Carbon Electrode for Simultaneous and Sensitive Detection of Dopamine and Paracetamol

“…It has ample applications in arthritis and ovarian cancer treatment [1]. Though it doesn't produce any harmful side effects, an overdose of PA will cause pancreatic problems, liver injury and also has chances of hepatotoxicity and nephrotoxicity [2][3][4]. It acts on the central nervous system to relieve the pain thus high concentration might induce undesired side effects [5].…”

A Sensitive and Selective Electrochemical Method for the Simultaneous Determination of Dopamine and Paracetamol based on a Multiwalled Carbon Nanotubes/Poly(l-lysine)-modified Glassy Carbon Electrode

“…Several methods for the simultaneous determination of PA and DA have been reported, consisting of spectrofluorimetry, 8 mass spectrometry, 9 spectrophotometry, 10 and electrochemistry. 2,1116 In this work, we modified the glassy carbon electrode with multiwalled carbon nanotubes and poly(L-lysine) (MWCNTs/ PLL/GCE). The modified electrode was applied for the first time for the determination of PA and DA.…”

“…According to Table S1, it is clear that the modified electrode developed in this study has a lower detection limit than some of the reported modified electrodes, 11,1416 while the linear dynamic range of the present study is also better than the values reported in most earlier studies. 2,13 The fabrication reproducibility for three MWCNTs/PLL/ GCE was investigated by comparing the oxidation peak current of 20.0¯M DA and PA. The relative standard deviation (RSD%) values in five replicate measurements using three different electrodes were 3.4% (for DA) and 3.8% (for PA).…”