Abstract:The current study explicates the electro-oxidation behavior of formoterol fumarate (FLFT) in the presence of uric acid (UA) on the surface of poly thiazole yellow-G (TY-G) layered multi-walled carbon nanotube paste electrode (MWCNTPE). The modified (Poly(TY-G)LMWCNTPE) and unmodified (MWCNTPE) electrode materials were characterized through electrochemical impedance spectroscopy (EIS), field emission scanning electron microscopy (FE-SEM), and cyclic voltammetry (CV) approaches. The characterization data confirm… Show more
“…EIS investigation was operated for 1.0 mM K 4 [Fe(CN) 6 ] in 0.1 M KCl at 0.005 V of amplitude and 0.01 V of working potential. The Nyquist plots show that the BCNTPE presents a greater semicircle as associated with PTYMCNTPE, [30,32] which agrees that the charge transfer of the surface of CNTPE is considerably improved through the accumulation of electrochemically polymerized TY molecules.…”
Section: Resultssupporting
confidence: 58%
“…Also, electrochemical approaches display an elevated sensitivity and selectivity for electro and bioactive molecules on the surface of carbon‐based electrodes concerning conductive polymers modification. Conductive polymer films on the surface of carbon‐based electrochemical sensors attract extensive interest and have been applied as electrochemically polymerized chemical modifiers due to their taller stability, reproducibility, sensitivity, and a strong attraction to electrode surface with more surface sites [30] . Due to the application of these properties, titan yellow (TY) is used as an active agent in the form of poly(titan yellow) (PTY) and it was coated on the surface of CNTPE for RF electrochemical detection.…”
The bare carbon nanotube paste electrode (BCNTPE) is a helpful base material for the construction of different electrometric sensors for analytical purposes. The BCNTPE was chemically modified with a polymerization process using titan yellow (TY) dye for the selective determination of riboflavin (RF) in presence of dopamine (DA). A poly(titan yellow) modified carbon nanotubes paste electrode (PTYMCNTPE) has been constructed by a simple and eco‐friendly procedure. The PTYMCNTPE material surface was examined by cyclic voltammetry (CV), Field emission‐scanning electron microscopy (FE‐SEM), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV) methods. The outcomes suggested that the modified electrode displays high electrocatalytic action for the redox reaction of RF. The limit of detection (LOD) and limit of quantification (LOQ) for the detection of RF were found to be 2.679×10−8 M and 8.932×10−8 M, correspondingly. The proposed sensor was effectively applied for the determination of RF in a pharmaceutical sample.
“…EIS investigation was operated for 1.0 mM K 4 [Fe(CN) 6 ] in 0.1 M KCl at 0.005 V of amplitude and 0.01 V of working potential. The Nyquist plots show that the BCNTPE presents a greater semicircle as associated with PTYMCNTPE, [30,32] which agrees that the charge transfer of the surface of CNTPE is considerably improved through the accumulation of electrochemically polymerized TY molecules.…”
Section: Resultssupporting
confidence: 58%
“…Also, electrochemical approaches display an elevated sensitivity and selectivity for electro and bioactive molecules on the surface of carbon‐based electrodes concerning conductive polymers modification. Conductive polymer films on the surface of carbon‐based electrochemical sensors attract extensive interest and have been applied as electrochemically polymerized chemical modifiers due to their taller stability, reproducibility, sensitivity, and a strong attraction to electrode surface with more surface sites [30] . Due to the application of these properties, titan yellow (TY) is used as an active agent in the form of poly(titan yellow) (PTY) and it was coated on the surface of CNTPE for RF electrochemical detection.…”
The bare carbon nanotube paste electrode (BCNTPE) is a helpful base material for the construction of different electrometric sensors for analytical purposes. The BCNTPE was chemically modified with a polymerization process using titan yellow (TY) dye for the selective determination of riboflavin (RF) in presence of dopamine (DA). A poly(titan yellow) modified carbon nanotubes paste electrode (PTYMCNTPE) has been constructed by a simple and eco‐friendly procedure. The PTYMCNTPE material surface was examined by cyclic voltammetry (CV), Field emission‐scanning electron microscopy (FE‐SEM), electrochemical impedance spectroscopy (EIS), and differential pulse voltammetry (DPV) methods. The outcomes suggested that the modified electrode displays high electrocatalytic action for the redox reaction of RF. The limit of detection (LOD) and limit of quantification (LOQ) for the detection of RF were found to be 2.679×10−8 M and 8.932×10−8 M, correspondingly. The proposed sensor was effectively applied for the determination of RF in a pharmaceutical sample.
“…The EIS was accomplished for K 4 [Fe(CN) 6 ] (1.0 mM) in KCl (0.10 M) having the potential of 0.10 V. From the Nyquist plots (a, b), the BCNTPE semicircle radius was higher than SDSMCNTPE, which specified that the charge transfer resistance (R ct ) of SDSMCNTPE is lesser as compared to BCNTPE. This obtained data shows that, the conductance of SDSMCNTPE is more with more active cites and this is probably due to the strong interaction of SDS and CNTPE surface [ 46 ]. Fig.…”
Section: Resultsmentioning
confidence: 99%
“…The BCNTPE was prepared according to the procedure described by our previous works [ 46 , 47 ]. We describe a trouble-free process to get SDS surfactant immobilized CNTPE.…”
Selective, sensitive, easy, and fast voltammetric techniques were developed for the analysis of Hydroxychloroquine (HCQ). These analysis were carried out at sodium dodecyl sulphate modified carbon nanotube paste electrode (SDSMCNTPE) using an aqueous 0.2 M phosphate buffer solution as supporting electrolyte. The field emission-scanning electron microscopy, cyclic voltammetry (CV), and electrochemical impedance spectroscopy were used for material characterization. A minute quantity of the SDS surfactant was sufficient to convey an outstanding electrocatalytic action to the electrochemical oxidation nature of HCQ. The HCQ molecule parades only electrochemical oxidation (irreversible) with the transfer of two electrons. The detection of HCQ was carried out through CV method at SDSMCNTPE and bare carbon nanotube paste electrode (BCNTPE). The corresponding analytical curve offered a decent linear nature in the considered HCQ concentration range (10–40 µM) and the detection limit was found to be 0.85 µM. The significant peak to peak split-up was observed between HCQ and interferents with a decent sensitivity and stability. The SDSMCNTPE to be an approachable electrode for the usage in the examination of HCQ independently and in the presence of paracetamol (PC) and ascorbic acid (AA). Thus, they were used to determine HCQ in pharmaceutical formulations and the results that showed good agreement with comparative methods. Furthermore, a mechanism for HCQ electro-oxidation was proposed.
“…Moreover, mercury immobilized [ 11 ] on a carbon nanotube structure [ 12 ] was used, where we sought a carbon surface that has catalytic effects [ 13 ], a large surface area, and high electrical conductivity [ 14 ], and whose probe can react with the SA target. Redox [ 15 , 16 ] voltammograms [ 17 , 18 ] were obtained via the square wave (SW) stripping and cyclic [ 19 ] voltammetric reaction [ 20 , 21 ]. The analytical parameters were optimized, and the results achieved low detection ranges for the SA target.…”
Staphylococcus aureus bacteria is a ubiquitous Gram-positive microorganism that causes infections related to the sudden infant death syndrome. Recently, basic detection methods depend on complicated PCR amplification, electric separation, spectric adsorption and other detection systems. However, in this study, simplified sensitive voltammetric skills are developed. To identify an effective diagnostic method for Staphylococcus aureus (SA), a voltammetric sensing probe was sought using mercury immobilized on a carbon nanotube sensor (MCN). The voltammetric MCN conditions were optimized through stripping and cyclic voltammetry. Diagnostic electrolyte was used on non-treated blood sera as an electrolyte solution. The optimum cyclic and stripping analytical working range was 0.5–4.0 mL (3 × 102~5 × 102 CFU/0.5 mL) SA. The statistic relative standard deviation of 0.1 mL SA was observed to be 0.0078 (n = 5). Using the optimum parameters, a diagnostic test was performed by the direct assay of SA in non-treated human blood and patient sera. Here, the developed results can be used for the direct assay of non-treated blood sera, organ monitoring, in-vivo diagnosis, and other assays requiring SA detection.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
