A competitive electrochemical aptamer-based method for aflatoxin B1 detection with signal-off response

2020 ◽  
Vol 12 (5) ◽  
pp. 646-650 ◽  
Author(s):  
Chao Wang ◽  
Yapiao Li ◽  
Qiang Zhao
Keyword(s):  
Methylene Blue ◽  
Electrochemical Detection ◽  
Aflatoxin B1 ◽  
Gold Electrode ◽  
Square Wave Voltammetry ◽  
Complementary Dna ◽  
Square Wave ◽  
Wave Voltammetry

Electrochemical detection of AFB1 with square wave voltammetry by using a complementary DNA modified gold electrode and a methylene blue labeled aptamer.

scholarly journals Determination of clopidogrel using square wave voltammetry at a gold electrode

2013 ◽  
Vol 78 (12) ◽  
pp. 2131-2140 ◽  
Author(s):  
Aleksandar Mladenovic ◽  
Vladislava Jovanovic ◽  
Slobodan Petrovic ◽  
Dusan Mijin ◽  
Sasa Drmanic ◽  
...  
Keyword(s):  
Gold Electrode ◽  
Square Wave Voltammetry ◽  
Pharmaceutical Preparation ◽  
Antiplatelet Agent ◽  
Hplc Method ◽  
Tablet Form ◽  
Square Wave ◽  
Wave Voltammetry ◽  
Anodic Stripping

The determination of clopidogrel, an antiplatelet agent, was performed at a gold electrode in pH 3.7 acetate buffer using cyclic voltammetry (CV) and square wave voltammetry (SWV). Each voltammogram is characterized by the well defined peak at approximately 1.0 V. The current of anodic stripping peak exhibits linear dependence on the clopidogrel concentration in a range from 317.89 mg cm-3 to 935.16 mg cm-3. The obtained linearity was applied to determine clopidogrel amount in the tablet form of pharmaceutical preparation (Plavix?). The results were compared to the UV spectrophotometric and HPLC method.

scholarly journals Electrochemical detection of exogenously administered melatonin in the brain

The Analyst ◽  
2020 ◽  
Vol 145 (7) ◽  
pp. 2612-2620 ◽  
Author(s):  
Elisa Castagnola ◽  
Kevin Woeppel ◽  
Asiyeh Golabchi ◽  
Moriah McGuier ◽  
Neharika Chodapaneedi ◽  
...  
Keyword(s):  
Electrochemical Detection ◽  
Square Wave Voltammetry ◽  
Electrochemical Measurement ◽  
Square Wave ◽  
Wave Voltammetry ◽  
The Brain

Optimized square wave voltammetry for electrochemical measurement of exogenously administered MT in vivo.

Electrochemical detection of sulphide in water/seawater using nanostructured carbon–epoxy composite electrodes

2014 ◽  
Vol 6 (13) ◽  
pp. 4775-4782 ◽  
Author(s):  
M. Ardelean ◽  
F. Manea ◽  
N. Vaszilcsin ◽  
R. Pode
Keyword(s):  
Electrochemical Detection ◽  
Square Wave Voltammetry ◽  
Epoxy Composite ◽  
Composite Electrodes ◽  
Nanostructured Carbon ◽  
Square Wave ◽  
Wave Voltammetry

Detection results obtained for sulphide detection in real water using a CNF electrode by square-wave voltammetry.

The first report of X-ray characterized organosilatrane-based receptors for the electrochemical analysis of Al3+ ions

2021 ◽  
Author(s):  
Gurjaspreet Singh ◽  
Sanjay Sharma ◽  
Akshpreet Singh ◽  
Ranjeet Kaur ◽  
Pawan ◽  
...  
Keyword(s):  
Gold Electrode ◽  
Square Wave Voltammetry ◽  
Electrochemical Behaviour ◽  
Electrochemical Analysis ◽  
Alkyl Ether ◽  
X Ray ◽  
First Report ◽  
Square Wave ◽  
Wave Voltammetry

The electrochemical behaviour of aryl–alkyl ether functionalized organosilatranes has been studied by square wave voltammetry (SWV) using a gold electrode.

An electrochemical detection of cadmium (II) and lead (II) ions using a polymer-modified electrode with a Schiff base by square wave voltammetry

2021 ◽  
Author(s):  
Mohammed Qasim Mohammed ◽  
Hani Khalil Ismail ◽  
Hasan Fisal Alesary ◽  
Stephen Barton
Keyword(s):  
Schiff Base ◽  
Modified Electrode ◽  
Electrochemical Detection ◽  
Square Wave Voltammetry ◽  
Electrochemical Behaviour ◽  
Modified Electrodes ◽  
Polymer Coatings ◽  
Square Wave ◽  
Enhanced Sensitivity ◽  
Wave Voltammetry

Abstract The work herein concentrates on the electrochemical detection of heavy metal ions, specifically cadmium and lead ions. The introduction and modification of functional groups such as Schiff bases had led to an enhanced sensitivity of the electrode to analytes. In this study, a platinum electrode has for the first time been modified with poly(3,4- ethylenedioxythiophene) (PEDOT/Schiff base) in CH2Cl2 containing Bu4NPF6 for use to detection cadmium (II) and lead (II) ions. The structure and morphology of the polymer coatings were characterised by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), respectively. The electrochemical synthesis and redox state response in monomer-free synthesised films have been studied by cyclic voltammetry. Moreover, the effect of scan rate on the electrochemical behaviour of the modified electrodes was also studied. The voltammetric findings have been used to calculate the surface coverage required for the polymer films and the stability of polymer electrodes in the monomer-free solutions. Square wave voltammetry (SWV) was applied for the determination of cadmium (II) and lead (II) ion concentrations and to assess the effects of pH on aqueous samples. The limits of detection for the modified electrode for cadmium (II) and lead (II) were found to be 0.95 μg L-1 and 1.84 μg L-1, respectively. These findings revealed that modified films can be considered good candidates for application in electrochemical detection devices

scholarly journals Electrochemical Detection of Dopamine at a Gold Electrode Modified with a Polypyrrole–Mesoporous Silica Molecular Sieves (MCM-48) Film

2018 ◽  
Vol 20 (1) ◽  
pp. 111 ◽  
Author(s):  
Izabela Zablocka ◽  
Monika Wysocka-Zolopa ◽  
Krzysztof Winkler
Keyword(s):  
Ascorbic Acid ◽  
Cyclic Voltammetry ◽  
Detection Limit ◽  
Modified Electrode ◽  
Electrochemical Detection ◽  
Molecular Sieves ◽  
Gold Electrode ◽  
Square Wave Voltammetry ◽  
Wave Voltammetry

A gold electrode modified with a polypyrrole–mesoporous silica molecular sieves (polypyrrole—MCM-48) nanostructure film was used for the electrochemical determination of small concentrations of dopamine (DA) by cyclic voltammetry and square-wave voltammetry techniques. This electrode showed good electrocatalytic activity for the oxidation of dopamine. The oxidation potential of dopamine was decreased significantly compared with that obtained at the bare gold electrode. The observed linear range for the determination of the dopamine concentration, without interferents through cyclic voltammetry measurements, was from 10 μM to 1.2 mM (R2 = 0.9989) for the gold electrode modified with the polypyrrole—MCM-48 nanostructure, with a detection limit of 2.5 μM. In the case of square-wave voltammetry, the linear range was 2–250 μM, with a correlation coefficient of 0.9996, and the detection limit was estimated to be 0.7 μM. The effects of interferents, such as ascorbic acid (AA) and uric acid (UA), on the electrochemical detection of dopamine were also examined. The modified electrode can successfully separate the oxidation potentials for ascorbic acid and dopamine, shifting the oxidation peak potential of ascorbic acid to a more positive potential, and significantly decreasing the peak current. The presence of ascorbic acid increased the sensitivity of dopamine determination at the modified electrode, and the detection limit was estimated to be 0.5 μM with 0.1 mM ascorbic acid to imitate physiological solutions. Additionally, studies showed that the presence of uric acid does not affect the electrochemical detection of dopamine. The modified electrode can be successfully applied for the quantitative analysis of dopamine both with and without interferents.

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