Highly Sensitive Electrochemical Sensor for the Detection of Chloramphenicol Based on Biomass Derived Porous Carbon

2020 ◽  
Vol 12 (3) ◽  
pp. 376-382 ◽  
Author(s):  
Guoping Wang ◽  
NuerbiYayalikun ◽  
Xamxikamar Mamat ◽  
Yongtao Li ◽  
Xun Hu ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Porous Carbon ◽  
Modified Electrodes ◽  
Differential Pulse ◽  
Reduction Peak ◽  
Active Electrode ◽  
Carbon Doped ◽  
Free Process ◽  
Highly Sensitive ◽  
Voltammetry Methods

In this study, the method for detection of chloramphenicol was investigated by electrochemical sensor; the sensor was constructed by biomass derived porous carbon. At first, porous carbon doped with hetroatoms (nitrogen, sulfur, phosphorus) was synthesized based on the use of pyrolysis and high temperature carbonization methods. Elaeagnusangustifolia L. gum was used as the carbon source in the facile template-free process. The biomass derived porous carbon was then used as the active electrode material for antibiotic sensing. The chemically modified electrodes properties were studied with the cyclic voltammetry and differential pulse voltammetry methods. The effects of the scan rate, accumulation time and pH, were carefully considered. Comparison with other working electrodes at the optimized conditions indicated that the N, S, P triple doped porous carbon modified glassy carbon electrode appeared a well-defined reduction peak towards chloramphenicol. The linear concentration response of chloramphenicol ranged from 1 to 40 μM (R=0.9903) and 50 to 500 μM (R=0.9923), and a low detection limit of 0.01 μM (S/N=3). Furthermore, the constructed novel electrochemical sensor was used for detection of chloramphenicol in real samples and achieved satisfactory recovers.

Electrochemical Sensor under Nanostructured Materials

2020 ◽  
Vol 852 ◽  
pp. 70-79
Author(s):  
Geng Li
Keyword(s):  
Electrochemical Sensor ◽  
Electrochemical Behavior ◽  
Electrode Materials ◽  
Modified Electrodes ◽  
Differential Pulse ◽  
Good Effect ◽  
Composite Nanomaterials ◽  
Molybdenum Dioxide ◽  
Preparation Methods ◽  
Pulse Voltammetry

In order to study the electrochemical sensor of nanometer mechanism materials to realize the high sensitive detection of different chemical molecules, in this research, the preparation methods of molybdenum dioxide nanomaterials, molybdenum dioxide/metal particles (Au, Pt, Au@Pt) composites and the preparation of molybdenum dioxide nanomaterials, molybdenum dioxide /Au composite nanomaterials, molybdenum dioxide /Pt composite nanomaterials and molybdenum dioxide /Au @Pt composite nanomaterials were introduced. Then the electrochemical behavior of several modified electrodes, electrochemical behavior in catechol system, scanning and pH were applied to the modified electrode. Finally, the electrode p-catechol system was detected by differential pulse voltammetry and the actual samples were analyzed. The results showed that compared with unmodified electrode materials, the electrode modified by molybdenum dioxide nanomaterials, molybdenum dioxide /Au composite nanomaterials, molybdenum dioxide /Pt composite nanomaterials and molybdenum dioxide /Au @Pt composite nanomaterials has better electrocatalytic performance and the detection of catechol has a good effect. Among them, the electrochemical sensor constructed by MoS2-Au@Pt composite has the best detection performance for catechol. The results have a good guiding significance for the performance improvement of electrochemical sensor.

scholarly journals Highly Sensitive Detection of Dopamine at Ionic Liquid Functionalized RGO/ZIF-8 Nanocomposite-Modified Electrode

2019 ◽  
Vol 2019 ◽  
pp. 1-9 ◽  
Author(s):  
Lei Cheng ◽  
Youjun Fan ◽  
Xingcan Shen ◽  
Hong Liang
Keyword(s):  
Ionic Liquid ◽  
Modified Electrode ◽  
Electrocatalytic Activity ◽  
Electrochemical Impedance ◽  
Modified Electrodes ◽  
Differential Pulse ◽  
Zeolitic Imidazolate Framework ◽  
Response Range ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

A hybrid and hierarchical nanocomposite was successfully prepared by the growth of zeolitic imidazolate framework-8 (ZIF-8) on the template of ionic liquid (IL, [Bmim][BF4]) functionalized reduced graphene oxide (IL-RGO). The structure and morphology of the IL-RGO/ZIF-8 nanocomposite were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectrometer (FTIR), and Raman spectroscopy. The results showed that RGO sheets were refrained from restacking by IL, and ZIF-8 nanoparticles grew well on the surface of IL-RGO. Owing to the synergistic effect from large surface area and excellent electrocatalytic activity of ZIF-8 and great electrical conductivity of IL-RGO, a highly sensitive sensor for dopamine (DA) can be obtained. IL-RGO/ZIF-8-modified electrode exhibits good electrocatalytic activity and electroconductive properties towards DA which were investigated by cyclic voltammetry (CV), differential pulse voltammetry (DPV), and electrochemical impedance spectroscopy (EIS). Compared with bare or IL-RGO-modified electrodes, the IL-RGO/ZIF-8-modified electrode effectively depressed the oxidation overpotential of DA. The linear response range of DA was from 1.0×10−7 to 1.0×10−4 mol/L with a low detection of limit 3.5×10−8 mol/L. In addition, the sensor was shown to provide satisfactory stability for the determination of DA.

scholarly journals Novel Electrochemical Sensor Fabricated for Individual and Simultaneous Ultrasensitive Determination of Olaquindox and Carbadox Based on MWCNT-OH/CMK-8 Hybrid Nanocomposite Film

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3041 ◽  
Author(s):  
Yanqing Liu ◽  
Gengxin Hu ◽  
Hongwu Wang ◽  
Su Yao ◽  
Yinjian Ye
Keyword(s):  
Electrochemical Sensor ◽  
Simultaneous Determination ◽  
Modified Electrode ◽  
Electrochemical Impedance ◽  
Modified Electrodes ◽  
Differential Pulse ◽  
Hybrid Nanocomposite ◽  
Experimental Conditions ◽  
Linear Relationships

A hybrid nanocomposite consisting of hydroxylated multi-walled carbon nanotubes (MWCNTs−OH) and cube mesoporous carbon (CMK−8) was applied in this study to construct an MWCNT−OH/CMK−8/gold electrode (GE) electrochemical sensor and simultaneously perform the electro-reduction of olaquindox (OLA) and carbadox (CBX). The respective peak currents of CBX and OLA on the modified electrode increased by 720- and 595-fold relative to the peak current of GE. The performances of the modified electrode were investigated with electrochemical impedance spectroscopy, cyclic voltammetry, and differential pulse voltammetry. Then, the modified electrodes were used for the individual and simultaneous determination of OLA and CBX. The fabricated sensor demonstrated a linear response at 0.2–500 nmol/L in optimum experimental conditions, and the detection limits were 104.1 and 62.9 pmol/L for the simultaneous determination of OLA and CBX, respectively. As for individual determination, wide linear relationships were obtained for the detected OLA with levels of 0.05–500 nmol/L with LOD of 20.7 pmol/L and the detected CBX with levels of 0.10–500 nmol/L with LOD of 50.2 pmol/L. The fabricated sensor was successfully used in the independent and simultaneous determination of OLA and CBX in spiked pork samples.

A highly sensitive electrochemical sensor for Cd(II) based on protic salt derived nitrogen and sulfur co-doped porous carbon

2019 ◽  
Vol 1046 ◽  
pp. 115-122 ◽  
Author(s):  
Xingxing Wu ◽  
Shucheng Wu ◽  
Yingchun Li ◽  
Han Chen ◽  
Qunhui Yuan ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Porous Carbon ◽  
Highly Sensitive ◽  
Co Doped

Highly sensitive electrochemical sensor for chloramphenicol based on MOF derived exfoliated porous carbon

Talanta ◽  
2017 ◽  
Vol 167 ◽  
pp. 39-43 ◽  
Author(s):  
Lili Xiao ◽  
Ruiyu Xu ◽  
Qunhui Yuan ◽  
Fu Wang
Keyword(s):  
Electrochemical Sensor ◽  
Porous Carbon ◽  
Highly Sensitive

scholarly journals A sensitive electrochemical sensor based on polypyrrole/electrochemically reduced graphene oxide for the determination of imidacloprid

2019 ◽  
Vol 9 (3) ◽  
pp. 143-152 ◽  
Author(s):  
Chenglong Chen ◽  
Zhen Han ◽  
Wu Lei ◽  
Yong Ding ◽  
Jingjing Lv ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Electrochemical Sensor ◽  
Reduced Graphene Oxide ◽  
Modified Electrode ◽  
Ph Value ◽  
Differential Pulse ◽  
Reduction Peak ◽  
Reduced Graphene ◽  
Electrochemically Reduced Graphene Oxide ◽  
Sample Testing

The glassy carbon electrode (GCE) was modified by electrochemically reduced graphene oxide (ERGO) and polypyrrole (PPy) prepared by simple cyclic voltammetry (CV) electropoly­merization. The PPy/ERGO modified electrode (PPy/ERGO/GCE) was used as a platform of electrochemical sensor to detect imidacloprid (IMI) insecticide. CV and differential pulse voltammetry (DPV) were chosen as the methods to investigate of the electrochemical behavior of IMI on PPy/ERGO/GCE surface. Scanning electron microscopy (SEM) and Raman spectra were utilized to describe the morphology and structure of the modified electrode. Experimental parameters were optimized, such as the number of polymerization cycles, scan rate and the pH value of electrolyte. Under the optimized conditions, when the concentration of IMI was in the range of 1-10 μM and 10-60 μM, the increase of reduction peak current was linear with the concentration of IMI, and the low detection limit was found to be 0.18 μM (S/N = 3). Results showed that PPy/ERGO/GCE demonstrated satisfactory reproducibility and stability, and has great potential in actual sample testing.

Fabrication of Electrochemical Sensor for Epinine Determination Amplified with MgO/CNTs Nanocomposite and Ionic Liquid

2021 ◽  
Vol 17 ◽  
Author(s):  
Shirin Shahraki ◽  
Mahboubeh Masrournia ◽  
Hassan Karimi-Maleh
Keyword(s):  
Electrochemical Sensor ◽  
Dynamic Range ◽  
Differential Pulse ◽  
Chemical Precipitation ◽  
Precipitation Method ◽  
Carbon Paste ◽  
Highly Sensitive ◽  
Biological Compounds ◽  
Electro Oxidation

Background: Catecholamines are a large group of pharmacological and biological compounds that are widely used in biological systems. These compounds are prepared both naturally and synthetically with many key roles in human body and its activities. Therefore, many of researchers focused on identification and determination of catecholamines in biological samples. Methods: MgO/SWCNTs were synthesized through chemical precipitation method. In addition, cyclic voltammetry, differential pulse voltammetry and chronoamperometric methods were used for electro-oxidation reaction study of epinine at surface of modified electrode. Results: Carbon paste electrode (CPE) modified with MgO/SWCNTs nanocomposite and 1-butyl-3-methylimidazolium methanesulfonate (BMMS) was used as an electrochemical sensor for determiantion of epinine. Results showed a linear dynamic range of 5.0 nM-250 µM with a detection limit of 0.1 nM for epinine determination using MgO/SWCNTs/BMMS/CPE as a sensor. Conclusion: In the present study, a highly sensitive electrochemical sensor was designed and fabricated as an analytical tool for determination of epinine. MgO/SWCNTs/BMMS/CPE was successfully used for determination of epinine in water and dextrose saline with an acceptable recovery range of 98.7%-102.72%.

Highly sensitive electrochemical sensor for ozone in water using porous carbon felt electrode

1993 ◽  
Vol 5 (2) ◽  
pp. 121-124 ◽  
Author(s):  
Shunichi Uchiyama ◽  
Takao Ikarugi ◽  
Masayuki Mori ◽  
Kaname Kasama ◽  
Yoichi Ishikawa ◽  
...  
Keyword(s):  
Electrochemical Sensor ◽  
Porous Carbon ◽  
Carbon Felt ◽  
Highly Sensitive ◽  
Carbon Felt Electrode

A Review of Voltammetric Methods for Determination of Dopamine Agonists

2020 ◽  
Vol 16 ◽  
Author(s):  
Fatma Ağin
Keyword(s):  
Parkinson’S Disease ◽  
Parkinson's Disease ◽  
Biological Samples ◽  
Dopamine Agonists ◽  
Modified Electrodes ◽  
Nerve Cells ◽  
Electroanalytical Methods ◽  
Voltammetry Methods ◽  
Voltammetric Methods

Background: Dopamine agonists are useful drugs for the management of patients with Parkinson's disease in the early stages and in later stages of the disease. Parkinson's disease is a progressive neurodegenerative disease that primarily affects dopamine-producing nerve cells in the brain. They bind to dopamine receptors in nerve cells that regulate body movement and motor function. Electroanalytical methods are used in medicinal, clinical and pharmaceutical research. The voltammetry is one of the most commonly used electroanalytical methods. The aims of this review are to gather and discuss studies of voltammetric methods used in determination of dopamine agonists. Method: This review includes the use of various voltammetric methods for determination studies of dopamine agonists from pharmaceutical dosage forms and biological samples. These studies were examined in terms of used voltammetric method or methods, working electrode, buffer, pH and validation parameters. Results: Cabergoline, pramipexole, ropinirole have more studies, while bromocriptine and apomorphine have fewer studies in the literature. Differential pulse voltammetry and square wave voltammetry methods were the most applied methods for determination of dopamine agonist drugs from pharmaceuticals and biological samples. But, stripping, cyclic and lineer sweep voltammetry methods are less applied methods. In this studies, a lot of modified electrodes were developed and used to analyse of dopamine agonists. Conclusion: The voltammetric methods supply determination of therapeutic agents and/or their metabolites in clinical samples at extremely low concentrations without the necessity for the sample pre-treatment or time consuming extraction steps. Also the modified electrodes and validated voltammetric methods provide good stability, repeatability, reproducibility and high recovery for the analysis of the analyte.

Sensitive Detection of Levocetirizine as a new Generation Antihistamine by Stripping Square Wave Voltammetry

2020 ◽  
Vol 16 (4) ◽  
pp. 424-437
Author(s):  
Kubra Ozturk ◽  
Nurgul K. Bakirhan ◽  
Sibel A. Ozkan ◽  
Bengi Uslu
Keyword(s):  
Electrochemical Sensor ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Differential Pulse ◽  
Real Sample ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Square Wave ◽  
Real Sample Analysis ◽  
Tablet Dosage

Background:: new and selective electrochemical sensor was developed for the determination of levocetirizine dihydrochloride, which is an antihistaminic drug. Method:: The investigation was performed by using cyclic, differential pulse and square wave voltammetric methods on the β-cyclodextrin modified glassy carbon electrode. It is thereby planned to obtain information about levocetirizine determination and its mechanism. Result:: The efficiency of experimental parameters including pH, scan rate, and accumulation potential and time on the anodic response of levocetirizine dihydrochloride was studied. By employing the developed method and under optimized conditions, the current showed linear dependence with a concentration in the range between 2 × 10-8 M and 6 × 10-6 M in pH 2.0 Britton Robinson (BR) buffer. Conclusion:: The achieved limits of detection and quantification were found as 3.73 × 10-10 M and 1.24 × 10-9 M, respectively. In addition, the possibility of applying the developed sensor for real sample analysis was investigated, so β-cyclodextrin modified glassy carbon electrode was used to determine levocetirizine dihydrochloride in Xyzal® tablet dosage form. Finally, this sensor was successfully applied to the real sample as a selective, simple, reproducible, repeatable electrochemical sensor.

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