A simple platform for the electro-catalytic detection of the dimetridazole using an electrochemical sensor fabricated by electro-deposition of Ag on carbon graphite: application: orange juice, tomato juice and tap water

Abstract

The objective of this paper is to evaluate and optimize the experimental parameters of the electro-deposition of silver atom nuclei on a graphite carbon paste to elaborate an electrochemical sensor. The electro-deposition process was performed using the cyclic voltammetry. The electrochemical studies show that the deposited silver micro-particle array offers an excellent electro-catalytic activity towards the NO 2 attractor group of the dimetridazole side chain. SEM morphological analysis of the silver deposits indicates the presence of a large number of Ag micro-particles on the graphite carbon with good nucleation. The size of the Ag micro-particles is of the order of 19,7621 μm and their distribution is normal over the entire range of the pulp. DRX analysis of the deposit also indicates that the microcrystalline structure of the silver microcrystals in the deposit is face-centered cubic. The electrochemical behavior of dimetridazole is totally irreversible, the transfer process is controlled by diffusion phenomena on the surface of the electrode covered by a silver deposit realized μAg@CPE. The analytical performance of the constructed electrode shows a good selectivity. Calibration curves for the detection of dimetridazole have been drawn in the concentration range of 3,5 × 10 −4 mol/L to 10 −6 mol/L using cyclic voltammetry method, with a detection and quantification limits of 6.565 × 10 −7 mol/L and 2.216 × 10 −6 mol/L respectively. The applicability of the constructed electrode has been tested in real samples including orange juice, tomato juice, tap water. The results obtained show a recovery rate above 94%, which is very satisfactory.

Electroanalysis of nirofurazone at silver particles and graphite powder composite electrode

“…This result confirms that the nucleation of silver nano particles is immobilized on the majority of the carbon graphite paste surface, and that the Ag atoms produced by the reduction reaction of Ag + ions have been prompted in an Ag nanostructure on the surface of our elaborated electrode, providing a good electro-catalytic capacity. And that the range of potentials used during Ag electro-deposition is ideal for the formation of crystals a silver layer on the carbon graphite sheets [22,23] EDX analysis Fig. 5B indicates the existence of silver peaks at 0.4 keV,3 keV, 3.3 keV, and 3.5 keV.…”

“…The creation of silver particles can be seen in the X-ray diffraction examination of the silver placed on the carbon paste. Three metallic silver peaks at 2θ° of 38.18°, 46.62°, 63.01° 66.42° and 76.4° witness to the metallic condition of the silver placed on the carbon paste and its uniform distribution across the whole surface of the carbon paste and on the carbon sheets [22,23] (Fig. 4).…”

“…The unmodified (CPE) were created using the following procedure [22]. A portion of the homogeneous paste was carefully positioned in the electrode cavity (fabricated in the lab, with a geometrie of 0.1256 cm 2 ) and polied with a smooth piece of paper.…”

Detection and Treatment of Persistent Pollutants in Water: General Review of Pharmaceutical Products

“…[56][57][58][59] In other cases, to modify the surface of the GCE, electrodeposits/ electropolymerization of the material of interest are performed. [60,61] High conductivity, great hardness, high temperature resistance, high chemical stability, low oxidation rate, and extremely low pore sizes. [62] The surface is renewed by polishing it, however, in some cases the film remains so adherent that it is necessary to resort to the use of more abrasive procedures such as the use of acids, which shortens the useful life of the electrode.…”

Electrochemical sensor based on a ZnO-doped graphitized carbon for the electrocatalytic detection of the antibiotic hydroxychloroquine. Application: tap water and human urine

“…For hydroxychloroquine detection, a number of methods have been explored [ 20 ], including liquid chromatography-tandem mass spectrometry method [ 21 ], spectrophotometry [ 22 ], liquid-phase micro-extraction [ 23 , 24 ],high-performance liquid chromatography [ 25 , 26 ] and spectrophotometric [ 27 , 28 ] . However, in contrast to electrochemical sensors, alternative methods sometimes rely either time-consuming preparation procedures, pricey machinery, or intelligent operators [ 29 – 33 ].…”