Double-layer effect correction in chronoamperometry with linear potential sweep

Caselli, M.; Ottombrini, G.O.; Papoff, P.

doi:10.1016/0013-4686(68)80024-6

Cited by 11 publications

(5 citation statements)

References 15 publications

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“…4 (Bottom)) reiterates the capacitive effect due to the presence of active substances in the soil mixture double-layer. To understand the current change effect better, we can incorporate the following equation: 40,41…”

Section: Resultsmentioning

confidence: 99%

DENSE: DiElectric Novel Soil Evaluation System to Electrochemically Profile Soil Matrices

Dhamu

Muthukumar²,

Paul

2022

J. Electrochem. Soc.

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Soil health and quality monitoring has been highly qualitative and speculative with more recent advancements still trying to fill the void of a holistic soil profile. Here, an electrochemical approach has been proposed to build a unique quantitative model – ‘DENSE’ that probes the soil diffuse double layer (DDL) dielectric to evaluate a thorough interfacial profile of the soil matrix. Room-temperature ionic liquid (RTIL) thin film was employed to modify the electrode probe to leverage as an effective transducer for a system driven by electrostatic interactions and charged diffusive behavior. The soil was surveyed based on fundamental understandings of electrochemistry and thereby obtaining equivalent metrics using chronoamperometry, electrochemical impedance spectroscopy, and chronocoulometry modalities to determine interfacial characteristics at the soil-water double layer. Capacitive dominant nature was exhibited in more coarse-drier soils similar to a case of non-faradaic electrochemical characteristics while the presence of water in the composite system seems to induce a slightly more charge transfer behavior indicative of mobile electrochemically active species. This gives a fundamental discernibility between the soil physico-chemical state corresponding to the output that is modelled using an impedemetric circuit fit and serves as a soil dielectric probing mechanism.

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Section: Resultsmentioning

confidence: 99%

DENSE: DiElectric Novel Soil Evaluation System to Electrochemically Profile Soil Matrices

Dhamu

Muthukumar²,

Paul

2022

J. Electrochem. Soc.

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“…Tracking antibody-antigen interactions via chronoamperometry.-Chronoamperometry (CA) has been widely studied and utilized as a modality to probe current-time dependence for diffusion limited processes at the electrode surface. 40,41 Traditionally, it has been used as a mechanism to visualize the electrochemical impacts of redox reaction processes and non-faradaic diffusion behavior. In this study-CA was employed to monitor the double layer modulation due to antibody-antigen binding with an input step bias of 250 mV/500 mV applied towards electrode 1 of the IDE microelectrode for 30 s. This capacitive dominant current was captured at the min-max position within 0.01 s of the bias applied.…”

Section: Resultsmentioning

confidence: 99%

A Highly Sensitive Electrochemical Sensor System to Detect and Distinguish Between Glyphosate and Glufosinate

Dhamu

Poudyal

Muthukumar³

et al. 2021

J. Electrochem. Soc.

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Glyphosate and Glufosinate are widely used herbicides worldwide for controlling weeds in the agriculture field. The large increase in the herbicides tolerant plants has dramatically affected the level of usage of these herbicides recently. With the growing alarm about the associated toxicity to the environmental and human health, there is a need for direct low concentration detection of these herbicides present at the various food crops products and water. In this work, we present a simple electrochemical sensor to selectively detect glyphosate in presence of Glufosinate a structurally similar phosphorus containing amino acid group. The sensor substrate is made up of an interdigitated Au microelectrode, which was immobilized with glyphosate antibody, bounded with the help of the Dithiobis (succinimidyl propionate) (DSP) crosslinker. The data obtained using non-faradaic EIS method, showed a linear range across the whole dosing interval-10 ng ml−1 to 50 ug ml−1 for glyphosate in presence of the interfering component Glufosinate with the detection limit of 10 ng ml−1 and the sensitivity of 1.323% (change in impedance)/ppb. Further the sensor has been proven to measure the spiked pesticides doses in real oatmeal samples. Such micro-volume, high-sensitive, and selective platform which requires no prior sample preparation can be a potentially game-changing electrochemical on-field sensing device to measure the threshold limit, a precautionary step to alert the common man using the food products and farmers working in the agriculture field.

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“…The potential ( ) in the diffuse double layer can have a rather significant effect on mass transport so that Fick's laws require modi-fication. A rederivation of the current-voltage relation, including this effect, was completed for irreversible charge transfer reactions (72). Calculated rate constants for zinc(II) reduction in several electrolyte solutions were about two orders of magnitude smaller than constants obtained from equations that neglected the potential.…”

Section: Controlled Potentialmentioning

confidence: 99%

“…Inorganic. Nucleation of mercury on platinum (376) and cadmium, indium, and thallium on solid mercury (395); surface oxidation of platinum (174,178,256,339) and gold (256), and surface oxide reduction on platinum metals (357); hydrogen on platinum single crystal faces (141,836); cadmium and lead in various electrolyte solutions (136); dissolution of mercury in cyanide (845); homogeneous reactions of cadmium cyanide (342) and nitrilotriacetate (346) complexes; adsorption effects on cadmium, lead, copper(II), and vanadium(III) (206); adsorption of cadmium in presence of iodide and bromide (18); mechanism of solid cadmium electrode (166); adsorption and rates of cadmium and thallium (193); mechanism of solid zinc electrode ( 185); effect of potential on zinc reduction (72); nucleation and orientation of copper (109); copper(I) (56) and nickel(II) (9) reduction in fused salts; inhibition of copper and iron by surface active agents (315); (149); diffusion of iodide in alcohols, effect of liquid structure at electrode surface (288); lithium amalgam electrode rate in dimethyl sulfoxide (77); oxygen reduction on mercury (377); oxygen reduction in nonaqueous solvents (375); formation of NO+ from nitrous acid (162); silver iodide solid electrolyte on graphite and platinum surfaces (172); silver rubidium iodide solid electrolyte on silver electrode (21); silver oxidation to Ag20 and AgO (355,356); catalytic oxidation of ammine complexes of chromium (II) to (III) (51) and of vanadium(III) to (V) (52) by chlorite ion.…”

Section: Controlled Potentialmentioning

confidence: 99%

Electrochemical relaxation techniques

Roe¹

1972

Anal. Chem.

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A four-year period of publications relevant to the title is included in this review. Because of the two-fold increase in articles to be collected and a four-fold decrease in preparation time, compared to the usual situation with a biannual review, I have taken a few short cuts. First, nearly all articles cited were selected from the Electrochemistry Section of Chemical Abstracts, Vols. 68-75 (1968-71). This limited the most recent publications to about November 1971 and also allowed a minor amount of overlap with the last review under this title (322). A second expedient was the frequent use of the information in the author's abstract and/or the Chemical Abstracts entry for my comments. A direct consequence of indulging in the practice, perhaps the basest of a reviewer's transgressions, is that at least one person will be irate for each article included. This confession is not to justify my modus operandi, but to illustrate that well written abstracts and summaries are very important. Electroanalytical Abstracts, which are not conveniently accessible to me, are

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Double-layer effect correction in chronoamperometry with linear potential sweep

Cited by 11 publications

References 15 publications

DENSE: DiElectric Novel Soil Evaluation System to Electrochemically Profile Soil Matrices

DENSE: DiElectric Novel Soil Evaluation System to Electrochemically Profile Soil Matrices

A Highly Sensitive Electrochemical Sensor System to Detect and Distinguish Between Glyphosate and Glufosinate

Electrochemical relaxation techniques

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