Journal articles: 'Electrochemical measurement'

1

Hara, Takeshi, Yuta Kinoshita, Hiroki Yamamoto, and Masumi Ogishima. "Fabrication of a Fundamental Electrochemical Measurement System for an Electrochemical Sensor." Journal of the Institute of Industrial Applications Engineers 10, no. 4 (October 26, 2022): 72–76. http://dx.doi.org/10.12792/jiiae.10.72.

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Park, Su-Moon, Jung-Suk Yoo, Byoung-Yong Chang, and Eun-Shil Ahn. "Novel instrumentation in electrochemical impedance spectroscopy and a full description of an electrochemical system." Pure and Applied Chemistry 78, no. 5 (January 1, 2006): 1069–80. http://dx.doi.org/10.1351/pac200678051069.

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The evolution of impedance measurement methods into the current state of the art is reviewed briefly, and recent efforts to develop new instruments to make electrochemical impedance spectroscopy (EIS) measurements faster and more accurate are described. The most recent approach for impedance measurement uses a multichannel detection technique, which is analogous to a spectroscopic measurement such as in Fourier transform infrared spectroscopy. This method, which is capable of making impedance measurements in real time during an electrochemical experiment, allows us to come up with a new integrated equation that makes a full description of an electrochemical system possible.

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Anseth, Ronnie, Nils-Olav Skeie, and Magne Waskaas. "The effect of precipitation and deposition layer growth on impedance measurements." tm - Technisches Messen 86, no. 1 (January 28, 2019): 25–33. http://dx.doi.org/10.1515/teme-2018-0062.

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AbstractThe objective of the study was to examine how precipitation and deposition layer growth in an electrochemical cell impact impedance measurements. A measurement system, based on Electrochemical Impedance Spectroscopy (EIS), was used to observe the impedance of an electrochemical cell while precipitation was occurring. The measurement system was also used together with measurements of the solution concentration (in parts per million, ppm) to examine what impact deposition layer growth has on an electrochemical cell. Experimental results indicate a measurable change in the impedance magnitude as the ionic concentration is altered through precipitation. A change in both impedance magnitude and the interfacial capacitance was observed when a deposition layer was established within an electrochemical cell. Results show that impedance measurements are susceptible to changes in solution conductivity and to the presence of a deposition layer in an electrochemical cell. Impedance measurements may be used as an indicator for deposition layer growth, but changes in the solution concentration should be considered when creating a model.

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Periasamy, Vengadesh, Prince Nishchal Narayanaswamy Elumalai, Sara Talebi, Ramesh T. Subramaniam, Ramesh Kasi, Mitsumasa Iwamoto, and Georgepeter Gnana kumar. "Novel same-metal three electrode system for cyclic voltammetry studies." RSC Advances 13, no. 9 (2023): 5744–52. http://dx.doi.org/10.1039/d3ra00457k.

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Dražić, D. M., and J. P. Popić. "Electrochemistry of Active Chromium: Part 1—Anomalous Corrosion and Products of Chromium Dissolution in Deaerated Sulfuric Acid." Corrosion 60, no. 3 (March 1, 2004): 297–303. http://dx.doi.org/10.5006/1.3287734.

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Abstract Chromium corroding in deaerated aqueous solution of sulfuric acid (H2SO4; pH 1 to 3) produces Cr(II) and Cr(III) ions simultaneously in the ratio 7:1, as well as H2. The corrosion potentials of electrochemically activated chromium are determined by the electrochemical processes as expected according to the Wagner-Traud model. However, the real rates of chromium corrosion determined by collecting evolved hydrogen, spectrophotometric determination of the accumulated Cr ions in the solution, or by weight-loss measurements are higher than the electrochemical dissolution rate by up to 12 times for pH 1.0. The effect is smaller for higher pH. This was due to the simultaneous “anomalous” (or chemical) dissolution process of the direct chemical reaction of Cr with H2O molecules, as proposed some time ago by Kolotyrkin and coworkers. Since “anomalous” dissolution cannot be detected by electrochemical means, it has been pointed out that in the presence of “anomalous” dissolution processes during metal corrosion, electrochemical corrosion rate measurements should be taken only as approximate, while the level of approximation should be determined by some other direct corrosion rate measurement method.

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Ikeda, Hikaru, Satohiro Itagaki, Shigeki Nishii, Yojiro Yamamoto, Yasuhiro Sadanaga, and Hiroshi Shiigi. "Electrochemical measurement of microbial activity." Review of Polarography 68, no. 1 (May 19, 2022): 15–25. http://dx.doi.org/10.5189/revpolarography.68.15.

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Saito, Shunsuke, Satoshi Sunada, Mitsuaki Furui, Susumu Ikeno, and Seiji Saikawa. "Electrochemical Behavior of Mg-6mass%Al Alloy Corroded in Na₂SO₄ and NaCl Solutions." Advanced Materials Research 409 (November 2011): 368–72. http://dx.doi.org/10.4028/www.scientific.net/amr.409.368.

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The corrosion behavior of Mg-6mass%Al alloy with different microstructure conditions was studied by electrochemical method in Na2SO4 and NaCl solutions. A measurement of polarization curves was carried out in order to investigate the fundamental electrochemical characteristics. Electrochemical impedance spectroscopy was carried out to discuss the corrosion characteristics that were obtained from polarization curves. Electrochemical measurements were carried out with as-cast, as solution-treated and two kinds of aged specimens, respectively. For measurement of polarization curves, the apparent difference was exhibited in behavior showing the pitting corrosion by difference of solutions. In all specimens, the corrosion current density which occurred in four kinds of specimens was higher in the NaCl solution than in Na2SO4 solution.

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Kurihara, Kazue. "Surface forces measurement for materials science." Pure and Applied Chemistry 91, no. 4 (April 24, 2019): 707–16. http://dx.doi.org/10.1515/pac-2019-0101.

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Abstract This article reviews the surface forces measurement as a novel tool for materials science. The history of the measurement is briefly described in the Introduction. The general overview covers specific features of the surface forces measurement as a tool for studying the solid-liquid interface, confined liquids and soft matter. This measurement is a powerful way for understanding interaction forces, and for characterizing (sometime unknown) phenomena at solid-liquid interfaces and soft complex matters. The surface force apparatus (SFA) we developed for opaque samples can study not only opaque samples in various media, but also electrochemical processes under various electrochemical conditions. Electrochemical SFA enables us to determine the distribution of counterions between strongly bound ones in the Stern layer and those diffused in the Gouy-Chapman layer. The shear measurement is another active area of the SFA research. We introduced a resonance method, i.e. the resonance shear measurement (RSM), that is used to study the effective viscosity and lubricity of confined liquids in their thickness from μm to contact. Advantages of these measurements are discussed by describing examples of each measurement. These studies demonstrate how the forces measurement is used for characterizing solid-liquid interfaces, confined liquids and reveal unknown phenomena. The readers will be introduced to the broad applications of the forces measurement in the materials science field.

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Chapin, Ashley Augustiny, Jinjing Han, and Reza Ghodssi. "Adsorption Kinetic Model Predicts and Improves Reliability of Electrochemical Serotonin Detection." Methods and Protocols 6, no. 1 (January 9, 2023): 6. http://dx.doi.org/10.3390/mps6010006.

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Serotonin (5-HT) is a neurotransmitter involved in many biophysiological processes in the brain and in the gastrointestinal tract. Electrochemical methods are commonly used to quantify 5-HT, but their reliability may suffer due to the time-dependent nature of adsorption-limited 5-HT detection, as well as electrode fouling over repeated measurements. Mathematical characterization and modeling of adsorption-based electrochemical signal generation would improve reliability of 5-HT measurement. Here, a model was developed to track 5-HT electrode adsorption and resulting current output by combining Langmuir adsorption kinetic equations and adsorption-limited electrochemical equations. 5-HT adsorption binding parameters were experimentally determined at a carbon-nanotube coated Au electrode: KD = 7 × 10−7 M, kon = 130 M−1 s−1, koff = 9.1 × 10−5 s−1. A computational model of 5-HT adsorption was then constructed, which could effectively predict 5-HT fouling over 50 measurements (R2 = 0.9947), as well as predict electrode responses over varying concentrations and measurement times. The model aided in optimizing the measurement of 5-HT secreted from a model enterochromaffin cell line—RIN14B—minimizing measurement time. The presented model simplified and improved the characterization of 5-HT detection at the selected electrode. This could be applied to many other adsorption-limited electrochemical analytes and electrode types, contributing to the improvement of application-specific modeling and optimization processes.

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Othman, Ali. "2021 Colin Garfield Fink Postdoctoral Summer Fellowship – Summary Report Luciferase – Functionalized 3D Highly Porous Gold-based Electrochemical Biosensors." Electrochemical Society Interface 30, no. 4 (December 1, 2021): 36–37. http://dx.doi.org/10.1149/2.f08214if.

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Recent advances in electrochemical biosensors have focused on new materials and strategies to improve specificity, sensitivity, stability, and response time. Herein, we aim to develop an electrochemical biosensor device by modification of a screen-printed electrode (SPE) with highly porous Au nanostructures and a bioluminescence (BL)-producing enzyme (luciferase). This approach leverages the enhanced electrochemically active surface area and the mass transport effect and offers an alternative configuration for optical output from the enzyme. The BL presents an instantaneous measurement of enzyme activity and can be exploited to show that the enzyme is being electrochemically controlled (an ON-OFF switchable sensor).

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Ueno, Fumiyoshi. "Ⅳ. Electrochemical Measurements in Various Environments―Nuclear Power Plant I （Electrochemical Measurement in Nuclear Power Plant）―." Zairyo-to-Kankyo 68, no. 1 (January 10, 2019): 2–8. http://dx.doi.org/10.3323/jcorr.68.2.

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Anseth, Ronnie, Nils-Olav Skeie, and Magne Waskaas. "Preliminary studies on monitoring fouling layers on a charged electrode using Electrical Impedance Spectroscopy." tm - Technisches Messen 85, no. 2 (February 23, 2018): 137–46. http://dx.doi.org/10.1515/teme-2017-0129.

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Abstract The objective of the study described in this paper was to examine whether fouling on an electrode surface can be monitored through impedance measurements using a modified Electrochemical Impedance Spectroscopy technique. The attempt was to evaluate a measurement system that could monitor fouling, within an electrochemical cell, by using EIS to find one single frequency to measure the impedance magnitude. An electrical potential difference was applied to the electrochemical cell to generate an electrical field to accelerate the deposition layer growth on one electrode. Experimental results show that the magnitude of the electrochemical cell impedance was in the range of 110 Ω over the duration of the experiment, which lasted one week. A measurable change in the impedance magnitude was detected when a deposition layer, caused by fouling, was present on one of the electrodes. The measurement frequency was selected specifically for the purpose to increase the deposition layer influence on the measured impedance magnitude, which was achieved by selecting a frequency that kept the capacitive reactance as low as possible. Results indicate that a measurement system, using one frequency, is capable of monitoring the deposition layer by measuring the magnitude of the electrochemical cell impedance.

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Stafford, Gery. "(Invited) In-Situ Stress Measurement during Electrochemical Processing." ECS Meeting Abstracts MA2022-02, no. 30 (October 9, 2022): 1086. http://dx.doi.org/10.1149/ma2022-02301086mtgabs.

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The electrochemical community often uses in situ wafer curvature and cantilever bending techniques to examine stress development during electrochemical processing. These techniques have been used to examine and quantify surface stress induced by surface charge (electrocapillarity), adsorption processes, and growth stress associated with underpotential deposition (UPD) and electrodeposition. The sensitivity of the stress measurement to surface processes makes this technique particularly relevant for electrochemical studies. For example, we have used in situ surface stress measurements to examine the underpotential deposition of a variety of metals (M) onto (111)-textured Au cantilever electrodes. The stress response clearly shows regions of anion desorption, M–Au bond formation, and in some cases, stress relaxation that can be attributed to surface alloying. This talk will focus on the surface and growth stress that develops during a variety of electrochemical processes, including metal deposition, the formation of elastically strained Pt films for electrocatalysis, and adsorbate-induced surface stress, such as carbon monoxide (CO) on Pt.

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ICHINO, Ryouichi, Masazumi OKIDO, and Takeo OKI. "Electrochemical measurement of electrolytic degreasing rate." Journal of the Surface Finishing Society of Japan 40, no. 1 (1989): 128–29. http://dx.doi.org/10.4139/sfj.40.128.

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15

Chen, Y. M., G. P. Yu, and J. H. Huang. "Pinhole Enlargement during Electrochemical Porosity Measurement." CORROSION 58, no. 10 (October 2002): 846–48. http://dx.doi.org/10.5006/1.3287666.

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Itagaki, Masayuki. "Measurement and Interpretation of Electrochemical Impedance." Zairyo-to-Kankyo 48, no. 11 (1999): 681–85. http://dx.doi.org/10.3323/jcorr1991.48.681.

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17

Inoue, Hiroyuki. "A Grounding in Electrochemical Noise Measurement." Zairyo-to-Kankyo 52, no. 9 (2003): 444–51. http://dx.doi.org/10.3323/jcorr1991.52.444.

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Halpern, Jeffrey M., Emily Ziino, and Sabrina Marnoto. "Measurement Drift in Electrochemical Impedance Spectroscopy." ECS Meeting Abstracts MA2020-01, no. 45 (May 1, 2020): 2577. http://dx.doi.org/10.1149/ma2020-01452577mtgabs.

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Yabuki, Soichi, and Fumio Mizutani. "Electrochemical measurement of phenothiazine-interacted DNA." Bioelectrochemistry 63, no. 1-2 (June 2004): 253–55. http://dx.doi.org/10.1016/j.bioelechem.2003.10.022.

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Dvorak, Vojtech, Marek Bohrn, Lukas Fujcik, Jiri Haze, Vilem Kledrowetz, and Michal Pavlik. "Architecture of Compact Electrochemical Measurement Instrument." IFAC-PapersOnLine 49, no. 25 (2016): 159–63. http://dx.doi.org/10.1016/j.ifacol.2016.12.027.

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21

Liu, Chen Yao, Wei Wei Yu, Yun Guang Huang, Na Na Wang, Li Ping Zhu, Zong Chang Luo, and Zhi Ping Zhu. "Alternative Working Electrode for the Determination of the AntioxidantContent by Electrochemical Techniques." Applied Mechanics and Materials 548-549 (April 2014): 708–12. http://dx.doi.org/10.4028/www.scientific.net/amm.548-549.708.

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T501 is an antioxidant widely used in transformer oil. The content of T501 in transformer oil can be detected by electrochemical techniques, however, in the process of condition optimizing for electrochemical measurement, people haven’t done in-depth study the effect of working electrode on T510 antioxidant electrochemical measurement. This paper mainly introduced the alternative working electrodes for the determination of the antioxidant content. Through researching the electrochemical properties of T501 antioxidant by the electrochemical workstation, it is confirmed that the graphite electrode is the best working electrode in the electrochemical measurement of T501 antioxidant content.

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Wang, Xiang Jun, Shu Zhang, Yi Liu, and Dou Ji. "The Electrochemical Principle of Measuring Underwater Electric Field." Applied Mechanics and Materials 232 (November 2012): 863–68. http://dx.doi.org/10.4028/www.scientific.net/amm.232.863.

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Whether electric stealth ship, or ship by ship to achieve the electric field detection, location can’t be separated to provide high-precision measuring equipment field measured data, underwater electric field to discuss the principle of electrochemical measurements and underwater electric field measurement equipment calibration, field measurements of underwater deep understanding of electrochemical principles and calibration of measuring equipment underwater electric field can improve the accuracy of the electric field experiments, and finally according to proposed calibration method, calibration of measuring equipment of a type of electric field.

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Zhao, Wenjiao, Magnus Rohde, Ijaz Ul Mohsin, Carlos Ziebert, and Hans J. Seifert. "Heat Generation in NMC622 Coin Cells during Electrochemical Cycling: Separation of Reversible and Irreversible Heat Effects." Batteries 6, no. 4 (November 10, 2020): 55. http://dx.doi.org/10.3390/batteries6040055.

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The thermal behavior of a commercial lithium-ion cell with the cathode material LiNi0.6Mn0.2Co0.2O2 (NMC622) was investigated during the cycling process using a Tian-Calvet calorimeter (C80, SETARAM Instrumentation, France). Various current flows of 42.5, 85, and 170 mA corresponding to charging rates of 0.5, 1, and 2 C, respectively, were applied in the measurements. The corresponding heat flow rates were measured by the C80 calorimeter at 30 °C. The reversible heat effect due to the reversible electrochemical reaction was quantified by the entropy change measurement. The irreversible heat effect due to internal resistances was determined by the electrochemical impedance spectroscopy (EIS) and the galvanostatic intermittent titration technique (GITT). The results were compared with the direct measurement of the heat effect by calorimetry during electrochemical cycling.

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Stevic, Zoran, and Mirjana Rajcic-Vujasinovic. "System for electrochemical investigations based on a PC and the Lab VIEW package." Chemical Industry 61, no. 1 (2007): 1–6. http://dx.doi.org/10.2298/hemind0701001s.

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This paper describes an electrochemical research system based on the Lab VIEW computer software package. An overview of well known electrochemical methods, such as potential measurements, chronopotentiometry, chronoamperometry, cyclic voltammetry and EIS is given. Electrochemical impedance spectroscopy has been adapted for systems containing large capacitances. For signal generation and recording of the response of the investigated electrochemical cell, a measurement and control system was developed, based on a PC P4 computer. The rest of the hardware consists of a commercially available AD-DA converter and an external interface for analog signal processing. The interface is a result of the authors own research. The software platform for the desired measurement methods is Lab VIEW package, which is regarded as a high standard in the area of modern virtual instruments. The developed system was adjusted, tested and compared with other commercially available systems. One such system is in constant use at the Technical Faculty in Bor.

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Williams, Tyler, Rankin Shum, and Devin Rappleye. "Review—Concentration Measurements In Molten Chloride Salts Using Electrochemical Methods." Journal of The Electrochemical Society 168, no. 12 (December 1, 2021): 123510. http://dx.doi.org/10.1149/1945-7111/ac436a.

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The electrochemical measurement of concentration in molten chloride salts is a valuable tool for the control of existing and potential industrial processes, recycling of precious materials and energy production. The electrochemical techniques commonly used to measure concentration and each techniques’ associated theory are discussed. Practices which improve measurement accuracy and precision are set forth. Exceptionally accurate and precise measurements published in the literature are evaluated based on their performance in specified concentration ranges. The strengths and weaknesses of the most accurate measurements are briefly explored. Chronopotentiometry (CP) and square wave voltammetry (SWV) are accurate and precise with low concentration measurements. SWV was accurate at low concentrations, even in multi-analyte mixtures. CP was accurate for only single analyte mixtures. Open-circuit potentiometry (OCP) is accurate and precise in single-analyte mixtures but yields large errors in multianalyte mixtures. Cyclic voltammetry (CV), chronoamperometry (CA) and normal pulse voltammetry (NPV) are accurate and precise across all concentration ranges. NPV is exceptionally well suited for measurements in melts with multiple electroactive species.

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Bajgai, Ajay Kumar, Rajaram Karki, Jamuna Thapa Magar, and Puspa Lal Homagai. "Shorea robusta Bark Extract as a Novel Green Inhibitor for Mild Steel Corrosion in 1 M H2SO4 Solution." Amrit Research Journal 3, no. 01 (December 23, 2022): 29–45. http://dx.doi.org/10.3126/arj.v3i01.50494.

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Extract of Shorea robusta bark as a novel green inhibitor for mild steel (MS) corrosion has been investigated. Qualitative chemical tests, UV, and FTIR measurements were carried out to confirm phytochemicals in the extract. Gravimetric as well as electrochemical methods were employed to examine the inhibition efficiency of the extract. Effects of inhibitor concentration, immersion time as well as working temperature were investigated by weight loss measurement method. Weight loss measurement reveals the maximum inhibition efficiency of 1000 ppm inhibitor for half an hour immersion time. Also, 1000 ppm inhibitor can work up to a temperature of 55°C with 50% efficiency. Electrochemical measurements reflected the mixed type of inhibition behavior of the inhibitor. Polarization measurement results, the 93.73% and 75%, respectively for as-immersed and immersed samples in1000 ppm inhibitor concentration. Based on these findings, it is revealed that the Shorea robusta bark extract could be used as low temperature inhibitor.

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Chen, Xu Hai, and Min Du. "An Improved Chronoamperometry for Electrochemical Real-Time PCR Measurement." Advanced Materials Research 396-398 (November 2011): 110–14. http://dx.doi.org/10.4028/www.scientific.net/amr.396-398.110.

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Electrochemical real-time PCR (EC-rtPCR) overcomes several shortcomings of fluorescence-based real-time PCR. But traditional electrochemical method has some limitations which reduce the accuracy and efficiency of testing. To overcome the disadvantages of chronoamperometry (CA) we report a novel electrochemical method where a peak current is quickly generated for the current vs. time curve by changing the waveform of voltage excitation in the working electrode. In particular, we derived a mathematical model to illustrate the principle of this method and it can also be used to demonstrate that the peak current is linear with regards to the concentration of the target substance. Moreover, we developed a device with an improved electrochemical circuit to generate the voltage excitation and detect the peak automatically. Finally, the device was used to study the electrochemical behavior of K3[Fe(CN)6]. It’s shown that the method has a better signal to noise ratio and higher sensitivity than chronoamperometry. The obtained peak current is linear with regards to the concentration of the target substance.

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Setiyono, Riyanto, Tias Febriana Hanifa Lestari, Anni Anggraeni, Yeni Wahyuni Hartati, and Husein Hernadi Bahti. "UnpadStat Design: Portable Potentiostat for Electrochemical Sensing Measurements Using Screen Printed Carbon Electrode." Micromachines 14, no. 2 (January 20, 2023): 268. http://dx.doi.org/10.3390/mi14020268.

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In this research a portable potentiostat was built for electrochemical sensing measurements with three electrodes, specifically SPCEs. The circuit uses a microcontroller as the main controller to manage all activities, starting from adjusting the input voltage for the SPCEs, setting measurement parameters, measuring the resulting current, displaying graphics on the touch screen, sending data to the computer via the USB port, and connecting to the SD card. Measurements and errors with cyclic voltammetry techniques have been compared with commercial potentiostats. The measurement results on a dummy circuit and commercial SPCEs have an accuracy of more than 90% compared to commercial potentiostats. In addition, measurement data can also be saved to an SD card in .CSV format for further purposes.

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SHIROISHI, Hidenobu, and Tatsuhiro OKADA. "Open-Source Electrochemical Measurement System Equipped with Macro Language for Successive Measurements." Journal of Computer Chemistry, Japan 3, no. 2 (2004): 71–76. http://dx.doi.org/10.2477/jccj.3.71.

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Przondziono, Joanna, and Witold Walke. "Influence of the Type of Medical Sterilisation on Electrochemical Properties of Passive Layer Created on X10CrNi 18-8 Steel." Solid State Phenomena 212 (December 2013): 141–44. http://dx.doi.org/10.4028/www.scientific.net/ssp.212.141.

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The study presents results of impedance tests performed for wires made of X10CrNi 18-8 steel after electrochemical polishing and chemical passivation, subject to medical sterilisation with pressurised water steam or ethylene oxide. In order to determine the impact of sterilising agent on electrochemical characteristics of the passive layer, impedance measurements were made. Measurements were made with application of measurement system Auto Lab PGSTAT 302N equipped with FRA2 (Frequency Response Analyser) module. Impedance spectra of the system were determined in the tests and data obtained in the measurement was matched to the equivalent system. It made the ground for determination of numerical values of resistance and capacitance of the analysed systems. Impedance spectra of the tested system are presented in the form of Nyquist diagrams for various values of frequency, and as Bode diagrams. On the ground of performed test it was explicitly proved that application of steam sterilisation and sterilisation with ethylene oxide of wires made of X10CrNi 18-8 steel after chemical passivation used for urological guide wires has a favourable impact on their electrochemical characteristics.

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UEDA, Ryuji, Shukuji ASAKURA, Chih-Chian TING, Yoshio TANOZAKI, and Takeo SUGIURA. "Electrochemical Measurement of Ferric Chloride Spray Etching." Journal of the Surface Finishing Society of Japan 43, no. 11 (1992): 1065–69. http://dx.doi.org/10.4139/sfj.43.1065.

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KAWAGUCHI, Akihiro, Shin'ichi MAGAINO, Ryuichi YAMAZAKI, and Osami MORI. "Evaluation of Ultrasonic-cleaning by Electrochemical Measurement." Journal of the Surface Finishing Society of Japan 47, no. 2 (1996): 168–72. http://dx.doi.org/10.4139/sfj.47.168.

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Choi, H. J., and R. L. Cepulis. "Inhibitor Film Persistence Measurement by Electrochemical Techniques." SPE Production Engineering 2, no. 04 (November 1, 1987): 325–30. http://dx.doi.org/10.2118/13555-pa.

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Okada, Michiya, and Yasunori Hayashi. "Hydrogen Permeation in Iron by Electrochemical Measurement." Journal of the Japan Institute of Metals 50, no. 2 (1986): 201–7. http://dx.doi.org/10.2320/jinstmet1952.50.2_201.

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Yao, Sheng, and Min Wang. "Electrochemical Sensor for Dissolved Carbon Dioxide Measurement." Journal of The Electrochemical Society 149, no. 1 (2002): H28. http://dx.doi.org/10.1149/1.1426404.

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Liu, Wei-Chiun, Shao-Te Wu, Bin-Da Liu, and Chia-Ling Wei. "CMOS electrochemical measurement circuit for biomolecular detection." International Journal of Electronics 105, no. 9 (April 10, 2018): 1467–86. http://dx.doi.org/10.1080/00207217.2018.1460872.

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Gillis, Kevin D., Xin A. Liu, Andrea Marcantoni, and Valentina Carabelli. "Electrochemical measurement of quantal exocytosis using microchips." Pflügers Archiv - European Journal of Physiology 470, no. 1 (September 2, 2017): 97–112. http://dx.doi.org/10.1007/s00424-017-2063-2.

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38

Milocco, Ruben H. "Minimal measurement time in electrochemical impedance identification." Electrochimica Acta 39, no. 10 (July 1994): 1433–39. http://dx.doi.org/10.1016/0013-4686(94)85055-0.

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Kim, Jong Jip, and Su Yeon Kang. "Uncertainty evaluation in electrochemical noise resistance measurement." Corrosion Science and Technology 12, no. 5 (October 31, 2013): 220–26. http://dx.doi.org/10.14773/cst.2013.12.5.220.

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Collison, Michael E., Philip J. Stout, Tatyana S. Glushko, Kristen N. Pokela, Debra J. Mullins-Hirte, Joel R. Racchini, Melissa A. Walter, et al. "Analytical Characterization of Electrochemical Biosensor Test Strips for Measurement of Glucose in Low-Volume Interstitial Fluid Samples." Clinical Chemistry 45, no. 9 (September 1, 1999): 1665–73. http://dx.doi.org/10.1093/clinchem/45.9.1665.

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Abstract Background: Minimally invasive interstitial fluid (ISF) sampling and glucose measurement technologies were integrated into a hand-held device for diabetic glucose monitoring investigations. Methods: Conventional electrochemical test strip technology (Bayer Glucometer Elite®) was adapted to measure glucose in small (0.5–2.0 μL) samples of ISF. Test strip glucose measurements were performed on a commercial potentiostat and were compared to various reference glucose methodologies (YSI 2300 analyzer, microhexokinase procedure, Bayer Glucometer Elite). Characterizations of the integrated ISF sampling-glucose test strip design included accuracy and precision in various sample media (saline, ISF surrogates, diabetic ISF samples), sample volume dependence, test strip sterilization studies (electron beam, γ irradiation), and diabetic ISF sampling and glucose measurements. Results: Glucose measurements were free from significant media effects. Sample volume variations (0.6–3.2 μL) revealed only modest dependence of glucose measurement bias on sample volume (−1.5% per microliter). Sterilization treatments had only a minor impact on glucose response and test strip aging and no significant impact on interferent responses of the glucose test strips. Diabetic subject testing under minimum fasting conditions of at least 2 h with integrated ISF sampling and glucose measurement gave low ISF glucose measurement imprecision (CV, 4%) and mean glucose results that were indistinguishable from reference (microhexokinase) ISF glucose measurements and from capillary blood glucose measurements (Glucometer Elite). Conclusions: Conventional single-use, electrochemical glucose test strip and ISF collection technologies can be readily integrated to provide real-time ISF sampling and glucose measurements for diabetic monitoring applications.

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Grinchik, N. N., K. V. Dobrego, and M. A. Chumachenko. "On the Measurement of Electric Resistance of Liquid Electrolytes of Accumulator Battery." ENERGETIKA. Proceedings of CIS higher education institutions and power engineering associations 61, no. 6 (December 11, 2018): 494–507. http://dx.doi.org/10.21122/1029-7448-2018-61-6-494-507.

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Operational control of parameters of electrolytes (first of all–of specific electric conductivity), is an important electrochemical technology. The methods of measurement of electric conductivity of electrolytes is a subject of permanent discussions because of complexity of physical-and-chemical processes accompanying ion transport and of electrolyte polarization near surfaces of electrodes and of electrochemical processes on the electrodes surfaces. Actual highand low-frequency conductometric methods require relatively expensive equipment and are not free of methodological flaws. In this paper a new method of electric resistance of liquid electrolytes is described and substantiated. It is based on automatic performance of a series of measurements of electrolyte resistance at DC, data processing and extrapolation of an appropriate dependence to threshold voltage at measurement cell plates. The character of functions approximating resistance-applied voltage dependence and method of resistance determination are substantiated. The measurements of specific resistance of some electrolytes were performed. The advantages of the proposed method and measuring device are their simplicity, cheapness, reliability and, consequently, wider possibility to utilize it at technological lines and processes, even at such sites of production processes where such a control was impractical earlier. The method can be widely used for express-diagnostics of electrolytes in such areas as electrochemical energy storage, medicine, agriculture, chemical industry, food production.

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Li, Feng, Gao Yang Zhao, Ying Yang, Gary Pattrick, and Richard Moutloali. "Mild and Low-Cost Synthetic Process for Monodispersive Platinum Nanoparitcles on Carbon Aerogel." Materials Science Forum 809-810 (December 2014): 53–58. http://dx.doi.org/10.4028/www.scientific.net/msf.809-810.53.

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A mild synthetic process using formic acid as the reduction agent was applied to prepare 40 wt% Pt/carbon aerogel (CA) electrocatalyst. The as-prepared sample was characterized by transmission electron microscopy (TEM) and electrochemical measurements. The results exhibit Pt nanoparticles with narrow particle size distribution are dispersed throughout carbon aerogel structure. Moreover, the Pt/CA catalyst has smaller Pt nanoparticle mean size than Johnson Matthey HiSpecTM 4000 (JM4000). The electrochemical measurement results indicate that the Pt/CA catalyst with Pt loading of 40 wt% possesses similar electrochemical surface area (ESA) value and oxygen reduction reaction (ORR) activity as JM4000.

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Xing, Wei, Shizhang Qiao, Xiaozhong Wu, Xiuli Gao, Jin Zhou, Shuping Zhuo, Sandy Budi Hartono, and Denisa Hulicova-Jurcakova. "Exaggerated capacitance using electrochemically active nickel foam as current collector in electrochemical measurement." Journal of Power Sources 196, no. 8 (April 2011): 4123–27. http://dx.doi.org/10.1016/j.jpowsour.2010.12.003.

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Nofrizal, Nofrizal. "Gambir Extract As A Corrosion Inhibitor For Mild Steel In Acidic Solution." Scientific Contributions Oil and Gas 35, no. 3 (March 10, 2022): 139–45. http://dx.doi.org/10.29017/scog.35.3.786.

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The inhibition infl uence of Gambir extract in 1M Hidrocloric Medium on corrosion of mild steel in acidic solution was studied by weight loss measurements, potentiodynamic polarization, electrochemical impedance spectroscopy (EIS) and scanning electron microscope (SEM method. It is believed that the phenolic compounds that contained in the Gambir extract in 1 M Hidrocloric medium to be responsible for the inhibition. The corrosion studies shows that Gambir extract gives an anodic type of inhibition and best at the concentration of 150 ppm. The inhibition effi ciency for weight loss measurement, potentiodynamic polarization measurement, and electrochemical impedance spectroscopy were 76.52, 88.28 and 66.27% respectively. SEM analysis shows that the morphology of inhibited mild steel was improved compared with uninhibited mild steel.

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Wang, Hao, Jia Liu, and Di Zhu. "A Study of Precision Current Efficiency Curve Measurement with a Casing-Type Anode." Applied Sciences 11, no. 4 (February 4, 2021): 1425. http://dx.doi.org/10.3390/app11041425.

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Electrochemical machining (ECM) is a non-traditional machining technology that is widely used in the manufacturing of key components in the aviation industry. The current efficiency is defined as the ratio of the observed amount of dissolved metal to the theoretical amount predicted from Faraday’s law. In ECM, the current efficiency curve relates the dissolution rate of the anode material and the current density. Accurate measurement of the current efficiency curve is the basis for anode shape prediction and cathode tool design. However, in conventional measurement methods, the phenomenon of edge stray corrosion introduces significant measurement errors. Improving the current efficiency is thus a challenging task for any electrophysical or electrochemical machining process. To improve the measurement accuracy, this paper proposes a current efficiency curve measurement with a casing-type anode. In the proposed measurement method, the anode is designed in two parts: the mandril and the casing. The edge stray corrosion effect is mainly concentrated on the casing, and only the current distribution on the mandril is considered in the calculation of current efficiency. The measurement simulations of the conventional and the proposed methods were carried out. The simulation results show that the casing-type method significantly improves the accuracy of current efficiency measurements, and the current efficiency curve of 304SS was obtained.

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Ortiz Santos, Elvis, Laura Galicia Luis, Maria Luisa Lozano, and Gabriela Valdés-Ramírez. "Design of an Electrochemical Biosensor for the Quantification of H₂O₂ for Application to Cardiovascular Diseases." ECS Transactions 110, no. 1 (February 13, 2023): 333–38. http://dx.doi.org/10.1149/11001.0333ecst.

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Electrochemical biosensors, which are fast and reliable analytical tools, have attracted particular attention in recent years for their ability to incorporate biomolecules into nanomaterial-designed electrodes. In this study, an electrochemical biosensor for the detection of hydrogen peroxide (H2O2) was developed using a multi-walled carbon nanotube (EPMWC) platform electrochemically modified with poly [Fe (III)-5-Aphen] and using an oxide-reductase enzyme as recognition agent. Amperometry was applied to obtain the calibration curves for H2O2 at the reduction process. The analytical parameters such as sensitivity, linear range, and low detection limits for H2O2 were obtained. A sensitivity of 26.51µA/mM, linear range from (0.4 to 4.5) H2O2 mM and a LOD of 0.761 µM. The advance of this measurement system is the first step in the development process of an electrochemical biosensor for cardiovascular diseases applications.

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Watanabe, Kazuhiro, Kyoko Sugiyama, Sachiko Komatsu, Kentaro Yoshida, Tetsuya Ono, Tsutomu Fujimura, Yoshitomo Kashiwagi, and Katsuhiko Sato. "Voltammetric pH Measurements Using Azure A-Containing Layer-by-Layer Film Immobilized Electrodes." Polymers 12, no. 10 (October 12, 2020): 2328. http://dx.doi.org/10.3390/polym12102328.

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pH is one of the most important properties associated with an aqueous solution and various pH measurement techniques are available. In this study, Azure A-modified poly(methacrylic acid) (AA-PMA) was synthesized used to prepare a layer-by-layer deposited film with poly(allylamine hydrochloride) (PAH) on a glassy carbon electrode via electrostatic interactions and the multilayer film-immobilized electrode was used to measure pH. Cyclic voltammetry (CV) and differential pulse voltammetry (DPV) measurement were performed. Consequently, the oxidation potential of AA on the electrode changed with pH. As per Nernst’s equation, because H+ ions are involved in the redox reaction, the peak potential shifted depending on the pH of the solution. The peak potential shifts are easier to detect by DPV than CV measurement. Accordingly, using electrochemical responses, the pH was successfully measured in the pH range of 3 to 9, and the electrodes were usable for 50 repeated measurements. Moreover, these electrochemical responses were not affected by interfering substances.

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Jiménez-Fiérrez, Francisco, María Isabel González-Sánchez, Rebeca Jiménez-Pérez, Jesús Iniesta, and Edelmira Valero. "Glucose Biosensor Based on Disposable Activated Carbon Electrodes Modified with Platinum Nanoparticles Electrodeposited on Poly(Azure A)." Sensors 20, no. 16 (August 11, 2020): 4489. http://dx.doi.org/10.3390/s20164489.

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Herein, a novel electrochemical glucose biosensor based on glucose oxidase (GOx) immobilized on a surface containing platinum nanoparticles (PtNPs) electrodeposited on poly(Azure A) (PAA) previously electropolymerized on activated screen-printed carbon electrodes (GOx-PtNPs-PAA-aSPCEs) is reported. The resulting electrochemical biosensor was validated towards glucose oxidation in real samples and further electrochemical measurement associated with the generated H2O2. The electrochemical biosensor showed an excellent sensitivity (42.7 μA mM−1 cm−2), limit of detection (7.6 μM), linear range (20 μM–2.3 mM), and good selectivity towards glucose determination. Furthermore, and most importantly, the detection of glucose was performed at a low potential (0.2 V vs. Ag). The high performance of the electrochemical biosensor was explained through surface exploration using field emission SEM, XPS, and impedance measurements. The electrochemical biosensor was successfully applied to glucose quantification in several real samples (commercial juices and a plant cell culture medium), exhibiting a high accuracy when compared with a classical spectrophotometric method. This electrochemical biosensor can be easily prepared and opens up a good alternative in the development of new sensitive glucose sensors.

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Badeda, Julia, Monika Kwiecien, Dominik Schulte, and Dirk Sauer. "Battery State Estimation for Lead-Acid Batteries under Float Charge Conditions by Impedance: Benchmark of Common Detection Methods." Applied Sciences 8, no. 8 (August 6, 2018): 1308. http://dx.doi.org/10.3390/app8081308.

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Impedance or admittance measurements are a common indicator for the condition of lead-acid batteries in field applications such as uninterruptible power supply (UPS) systems. However, several commercially available measurement units use different techniques to measure and interpret the battery impedance. This paper describes common measurement methods and compares their indication for the state of health (SoH) to those of electrochemical impedance spectroscopy (EIS). For this analysis, two strings consisting each of 24 valve-regulated lead-acid (VRLA) batteries with a rated voltage of 12 V and about 7 Ah capacity were kept under standard UPS conditions in float charge for over 560 days. They were monitored continuously with a LEM Sentinel 2 and went into regular check-ups with impedance measurements by a Hioki BT3554 as well as electrochemical impedance spectroscopy (EIS) measurements with an impedance meter (μEIS). Today it is widely expected that solely the relative increase of the impedance reading is sufficient for the estimation of the available capacity. However, it can be shown that the measured relative increase deviates for different frequencies and therefore the choice of the excitation signal and measurement frequency does make a difference for the calculation of the available capacity. Finally, a method for a more decisive monitoring in field applications is suggested.

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Vrsalović, Ladislav, Emeka Emmanuel Oguzie, Mirko Gojić, Stjepan Kožuh, Ivana Ivanić, Lana Terzić, and Senka Gudić. "Intergranular Corrosion of Cu-Al-Ni Alloy in 0.5 mol dm−3 H2SO4 Solution." Kemija u industriji 69, no. 9-10 (2020): 457–64. http://dx.doi.org/10.15255/kui.2020.022.

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The corrosion behaviour of Cu-Al-Ni alloy in 0.5 mol dm–3 H2SO4 solution was investigated by electrochemical methods including open circuit potential measurement, electrochemical impedance spectroscopy measurements, linear and potentiodynamic polarization. Measurements were performed in 0.5 mol dm–3 H2SO4 at temperatures 20 and 40 °C. After polarization testing, corroded electrode surfaces were ultrasonically cleaned in deionized water and examined by light and scanning electron microscopy, while the elemental composition at individual points of the alloy surface was determined by EDS analysis. The results of the investigations revealed the occurrence of intergranular corrosion on the Cu-Al-Ni surface, which became more pronounced with increasing temperature.

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Journal articles on the topic 'Electrochemical measurement'

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