Direct quantitative analysis from the current curve data of pulse voltammetric techniques

Tu, Jiarun; Cai, Wensheng; Shao, Xueguang

doi:10.1016/j.jelechem.2014.05.001

Cited by 15 publications

(4 citation statements)

References 37 publications

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“…All pulse approaches rely on charging and faradaic currents’ unique behaviors after a potential step, or “pulse.” The charging current decays exponentially, but the faradaic current, decreases according to 1/(time) ½ especially in diffusion-controlled current according to the Cottrell equation (Eq. 1 ) 7 which describes the relationship between the current ( i ) flowing through an electrode and the rate of diffusion ( D ) of the analyte to the electrode surface. It elucidates how the current is directly proportional to the square root of time ( t ) and the concentration ( C ) of the electroactive species.…”

Section: Current Statusmentioning

confidence: 99%

Perspective—Advances in Voltammetric Methods for the Measurement of Biomolecules

Alyamni,

Abot,

Zestos

2024

ECS Sens. Plus

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Voltammetry is a powerful electroanalytical tool that makes fast, real-time measurements of neurotransmitters and other molecules. Electroanalytical methods like cyclic, pulse, and stripping voltammetry are useful for qualitative and quantitative examination. Neurochemical sensing has been enhanced by the use of carbon-based electrodes and waveform modification methods that improve sensitivity and stability of electrode performance. Voltammetry has revolutionized neurochemical monitoring by providing real-time information on neurotransmitter dynamics for neurochemical studies. Selectivity and electrode fouling remain issues for biomolecule detection, but recent advances promise new methods of analysis for other applications to enhance spatiotemporal resolution, sensitivity, selectivity, and other important considerations.

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Section: Current Statusmentioning

confidence: 99%

Perspective—Advances in Voltammetric Methods for the Measurement of Biomolecules

Alyamni,

Abot,

Zestos

2024

ECS Sens. Plus

View full text Add to dashboard Cite

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“…Therefore, elimination of the charging current has been an important goal in electrochemical analysis. Applications of chemometrics methods such as MCR-ALS [109,110], iterative target transformation factor analysis (ITTFA) [111], and ATLD and PARAFAC [112,113] for resolving net faradaic current contribution from total current have been reported. Figs.…”

Section: Casting a Look On Applications Of Matlab In Electrochemistrymentioning

confidence: 99%

“…Therefore, the pure faradaic component shows higher sensitivity rather than the raw cyclic voltammograms. Shao and Hemmateenejad who have the most important works on application of chemometrics to increase the sensitivity of electrochemical approaches have also performed more projects [110][111][112][113]. is seldom the case.…”

Section: Casting a Look On Applications Of Matlab In Electrochemistrymentioning

confidence: 99%

MATLAB in electrochemistry: A review

Jalalvand

Roushani

Goicoechea

et al. 2019

Talanta

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MATLAB (MATrix LABoratory) is a multi-paradigm numerical computing environment and fourth-generation programming language. MATLAB allows matrix manipulations, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs written in other languages, including C, C++, Java, Fortran and Python. Electrochemistry is a branch of chemistry that studies the relationship between electricity, as a measurable and quantitative phenomenon, and identifiable chemical change, with either electricity considered an outcome of a particular chemical change or vice versa. MATLAB has obtained a wide range of applications in different fields of science and electrochemists are also using it for solving their problems which help them to obtain more quantitative and qualitative information about systems under their studies. In this review, we are going to cast a look on different applications of MATLAB in electrochemistry and for each section, a number of selected articles published in the literature will be discussed and finally, the results will be summarized and concluded.

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“…In order to determine MP quantitatively, the differential pulse voltametric technique (DPV), possessing some advantages over the CV method such as low capacitive/background charging currents, high sensitivity and low detection limits [38] was employed in this study. The DPV parameters were extensively optimized using the AuNPs/PANI/SPCE, and the optimal conditions were found to be as follows: an applied potential of -1.4 V vs. Ag/AgCl for 2 min; a step potential of 50 mV; a modulation amplitude of 0.2 V; a modulation time of 0.2 s; and an interval time of 0.5s.…”

Section: Electrochemical Measurement Of Mp Using Dpvmentioning

confidence: 99%

Modification of screen-printed carbon electrode for detection of pesticides

Langor

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Methyl parathion (MP) is an organophosphate pesticide broadly used in agriculture to protect crops and fruits from the damages caused by insects and pests.� However, when it is used in large quantities, it can be potentially toxic to humans and animals, causing many poisoning effects. Moreover, its residues can also penetrate the food chain (via agriculture food products) as well as contaminating the environment, leading to air, water and soil pollution. Therefore, rapid determination and reliable quantification of trace level of MP are crucially needed for food safety and environmental monitoring. In this work, a low-cost and portable electrochemical sensor was simply developed using a screen-printed carbon electrode (SPCE) for determination of MP residues with enhanced sensitivity. Typically, the SPCEs fabricated in-house was modified with polyaniline (PANI) using electro-polymerization technique, followed by the electrodeposition of gold nanoparticles (AuNPs), to obtain the AuNPs/PANI/SPCE sensor for MP detection. The modified AuNPs with electrocatalytic activity could increase the electrochemical performance of the detection, while the characteristics of PANI could make the sensor more conductive. The determination of MP was thoroughly investigated using the modified electrode by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Under optimal conditions, the AuNPs/PANI/SPCE showed high sensitivity, good stability, and reproducibility with acceptable limit of detection (LOD). The proposed AuNPs/PANI/SPCE sensor could then be applied for MP detection in real samples with satisfactory recoveries (107.30% - 110.83%).

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Direct quantitative analysis from the current curve data of pulse voltammetric techniques

Cited by 15 publications

References 37 publications

Perspective—Advances in Voltammetric Methods for the Measurement of Biomolecules

Perspective—Advances in Voltammetric Methods for the Measurement of Biomolecules

MATLAB in electrochemistry: A review

Modification of screen-printed carbon electrode for detection of pesticides

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