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453 results about "Potentiostat" patented technology

A potentiostat is the electronic hardware required to control a three electrode cell and run most electroanalytical experiments. A Bipotentiostat and polypotentiostat are potentiostats capable of controlling two working electrodes and more than two working electrodes, respectively.

Biofouling self-compensating biosensor

An in vivo biosensor disposed upon a subject comprising an electrochemical cell having a plurality of electrodes and a computer-controlled voltage source incorporating a potentiostat that is generative of a poise potential regime, which computer-controlled voltage source is operationally coupled to a computing device that: computes an output current whose magnitude is proportional to an amount of an analyte in a bodily fluid of the subject; and, adjusts the output current for drift due to biofouling at points in time greater than or equal to an induction period; and, outputs the amount of the analyte by transducing the adjusted output current. Methods and algorithms for adjusting the output current for drift due to biofouling are provided.
Owner:ULTRADIAN DIAGNOSTICS

Electrochemical screening and early diagnosing instrument for malignant tumor

InactiveCN1866018AEasy to useOvercoming the deficiency of tumor-associated antigen specificityMaterial electrochemical variablesAbnormal tissue growthAntigen
The disclosed electrochemical screening and early diagnostic device for malignant tumor comprises: an immune detection chip (1) connected to a time-resolution multichannel potentiostat (2) that connects to a data process and display system (3) by an interface. Wherein, the chip (1) comprises eight working electrodes fixed different antigen films and Ag wire (a), Ag / AgCl reference electrode (b), a carbon-pair electrode (c), and an insulation film (d). This invention needs low cost, has intelligence and fit to fast detection.
Owner:NANJING UNIV

Integrated device for surface-contact sampling, extraction and electrochemical measurements

The invention relates to a device and method for non-invasive detection of an analyte in a fluid sample. In one embodiment, the device comprises: a collection chamber containing an absorbent hydrogel material; a fluidic channel connected to the collection chamber; a sensing chamber connected to the fluidic channel, wherein the device is comprised of a compressible housing that allows transfer of fluid collected by the collection chamber to be transferred to be extracted and withdrawn to the sensing chamber upon compression of the device, wherein the sensing chamber contains a material that specifically detects the analyte and wherein the sensing chamber is operably linked to a processor containing a potentiostat that allows detection of the analyte using electrochemical sensing.
Owner:ARIZONA STATE UNIVERSITY

Photoelectrocatalysis and oxidation device for treating organic substance in water

Fluid-bed photo-electro catalytic organic water processing device consists of titanium-base oxide positive electrode, negative oxygen electrode, TiO2 / C sulfide particle, ultraviolet light source, constant potentiometer DC power source, air distribution board and casing. Not only oxidizing action of positive electrode and reducting action of negative oxygen electrode are used, but also active perssad OH, H2O2, OH- and light, photocatalysis are used, to go deep into bed layer by strong stirring of fluidized particle to increase OH density of the system and to be uniform, TiO2 on surface of fluidized particle produces OH by lighting continuously, and surface of TiO2 particle is renewed continuously.
Owner:TAIYUAN UNIV OF TECH

Multi-channel potentiostat for biosensor arrays

Arrays of biosensors are provided along with methods for operating the arrays of biosensors. The array of biosensors may include a first reference electrode that is connected to an input of a first control amplifier; a first working electrode and a second working electrode in proximity with the first reference electrode; and a counter electrode that is connected to at least an output of the first control amplifier, where the first control amplifier is operative with the counter electrode to maintain a first specified voltage between the first working electrode and the first reference electrode, and between the second working electrode and the first reference electrode. The array of biosensors optionally may further include a second reference electrode that is connected to an input of a second control amplifier, where the second control amplifier is operative with the counter electrode to maintain a second specified voltage between the first working electrode and the second reference electrode, and between the second working electrode and the second reference electrode.
Owner:DARE MB INC

Conductive filter membrane and application thereof

The invention relates to a conductive filter membrane and its application. Based on manufacturing of a flat sheet membrane, a stainless steel screen is embedded to prepare a conductive membrane, and a conductive filter membrane is formed. The conductive filter membrane is directly used as a negative electrode, conductive corrosion-resistant materials such as graphite, stainless steel and the like are used as a positive electrode, and facilities such as a constant potential rectifier and the like are used along with a power supply so as to make the conductive filter membrane negatively charged. Electronegative pollutants in mixed liquor are obstructed by electrostatic repulsion so as to be deposited on the surface of the membrane. Meanwhile, the conductive filter membrane is directly used as a negative electrode, and a certain amount of H2O2 will be generated near the negative electrode (near the membrane) under the electrochemical action. By strong oxidizing ability, a certain amount of pollutants on the surface of the membrane can be removed by oxidation so as to enhance anti-pollution capacity. A routine filter membrane material determines practical applicability of the conductive filter membrane. The conductive filter membrane is directly used as the electrode to enhance fusion of an electrochemical system and an MBR system and strengthen effect of an electrical field.
Owner:TONGJI UNIV

Multi-gas microsensor assembly

InactiveUS20100276287A1Material electrochemical variablesElectrolyte anionSolid substrate
A multi-gas microsensor assembly for simultaneously detecting carbon dioxide and oxygen in real time. According to one embodiment, the assembly comprises a non-conductive, solid substrate. A plurality of sensing electrodes, a single reference electrode, and a single counter electrode are positioned on one side of the non-conductive, solid substrate. In addition, all of the electrodes are in intimate contact with the same side of a solid-polymer electrolyte anion-exchange membrane, the solid polymer electrolyte membrane having at least one gas diffusion opening aligned with each sensing electrode. The sensor is operated in a three-electrode potentiostatic mode, in which a constant potential is maintained between the sensing and reference electrodes, and the current is measured between the sensing and counter electrodes. Control of the electrodes is achieved with a small bi-potentiostat. The design of the bi-potentiostat allows at least two different sensing electrodes to share the same counter and reference electrodes.
Owner:GINER INC

Electrochemical polishing method for high purity aluminum under ultrasonic agitation

The invention relates to an electrochemical polishing method for the high purity aluminium under ultrasonic agitation, which belongs to the fields of the material chemistry and the electrochemistry. The electrochemical polishing method under the ultrasonic agitation comprises the following steps: high purity aluminium foil is added in absolute ethyl alcohol, so as to be cleaned with deionized water and through ultrasonic oscillations, and the natural oxide film in sodium hydroxide is removed; the aluminium foil after being pretreated is used as an anode, the platinum sheet is used as the cathode, the reference electrode is saturated calomel electrode, and the electropolishing solution is the mixed liquor composed of absolute ethyl alcohol and perchloric acid; the electrolysis vessel is positioned in an ultrasonic wave cleaner, and electrochemical polishing is performed on a constant potential rectifier. The self-organizing structure with nanoscale stripe shape is formed on the aluminium surface, the structure is observed by adopting the atomic force microscopy, and the size of the stripe-shaped nanostructure changes under the ultrasonic agitation; the composition of the polishing surface is analyzed through the Raman spectrum and the X-ray diffraction, so as to indicate that the composition of the polishing surface is amorphous aluminum oxide.
Owner:DALIAN UNIV OF TECH

Electrochemistry test method used for rotary type single-phase flow erosion testing

This invention discloses one electrical chemical test method for rotation single phase impulse erosion test, which comprises the following steps: processing the specimen into work electrode fixed onto test device and adjusting work, reference and aid electrode distance and the capacitor top is added with test erosion liquid with 75mm higher than the liquid; in static erosion medium liquid adopting electrical chemical method for anti-erosion till the current reduces to small to make the work electrode surface form even erosion product protection film; starting transducer motor and pre-setting acceleration curve through computer to observe constant level current curve change till there is burst.
Owner:ZHEJIANG SCI-TECH UNIV

Chemical sensor with replaceable sample collection chip

A chemical sensor is provided on a first semiconductor die. A potentiostat is provided on a second semiconductor die. An analog to digital converter and a microcontroller are provided on a third semiconductor die. The first die is configured to be connected to the second die. The second die is configured to be connected to the third die. The chemical sensor detects a chemical in the surrounding environment and outputs a signal to the analog to digital converter. The analog to digital converter converts the signal to a digital signal and outputs the digital signal to the microcontroller. The microcontroller provides a measurement of the concentration of the chemical in the surrounding environment.
Owner:STMICROELECTRONICS PTE LTD

Voltage buffer circuit for linear potentiostat

InactiveCN101105696AReduce transient responseReduce inhibitionElectric variable regulationCapacitanceEngineering
The invention relates to a voltage buffer circuit used in a linear voltage regulator. The circuit consists of a basic voltage buffer circuit, an output current monitoring circuit and a current mirror circuit; wherein the input end of the basic voltage buffer circuit is connected with the output end of a voltage difference amplifier of the linear voltage regulator which is also the output of a dynamic bias power source buffer circuit; the output end of the output current monitoring circuit is connected with the input end of the current mirror circuit; the output end of the current mirror circuit is in parallel connection with a static bias current source. Under the condition that the static power loss of voltage regulator circuit is not increased, the impact of a pole of the output end of the voltage buffer circuit to system phase margin and stability is reduced; the invention doesn't need the traditional linear voltage regulator and utilizes an outer wave filtering capacitance equivalent series resistance to generate zero point, which lowers the system cost, reduces use difficulty and reduces the impact of the equivalent series resistance to the transient state response and noise restraint capacity of the voltage regulator circuit; a chip upper frequency compensation capacitance is not needed, which saves chip area.
Owner:CHINA AEROSPACE TIMES ELECTRONICS CORP NO 771 RES INST

Method for treating organic wastewater through synergistic activation of persulfate using electrochemistry and Ni-Fe-LDH/rGO catalyst

The invention provides a method for treating organic wastewater through synergistic activation of persulfate using electrochemistry and a Ni-Fe-LDH / rGO catalyst. The method comprises the specific steps: adding persulfate and the Ni-Fe-LDH / rGO catalyst in an electrolysis device containing organic wastewater, degrading the organic wastewater under the effect of external electric field, providing a constant current for the electrolysis process by using a constant potential rectifier, using 0.1M of Na2SO4 as a support electrolyte in the electrolysis process, and continuously performing magnetic stirring in the test process so as to guarantee the sufficient contact of the catalyst and solution. The method not only can activate the persulfate through the electrochemical manner, but also can enhance the capability of the original catalyst to activate the persulfate, and multiple paths are used for synergistically degrading the organic pollutants. The method is simple in operation, flexible in reaction, high in catalysis efficiency, and good in degradation effect; the catalyst has good magnetism and stability, and has wide application prospect in the environment pollution governance field.
Owner:DALIAN UNIV OF TECH

Vapour-liquid two-phase flow accelerated corrosion test device

The invention relates to a vapour-liquid two-phase flow accelerated corrosion test device which is characterized by comprising a testing autoclave body, an oil bath heating jacket, an autoclave body cover, a magnetic rotating device, a high-temperature reference electrode, a graphite auxiliary electrode, a working electrode, a variable frequency motor, a potentiostat, a corrosion measurement computer, an equipment control cabinet, an inner lining, a gas-phase generator, an electric heater and a thermocouple sensor. In the invention, an electrochemical measurement method is adopted to carry out experimental study on the relevant properties of vapour-liquid two-phase flow accelerated corrosion, including the measurement of relevant coefficients of the transient corrosion property, the corrosion impedance and the corrosion reaction, the relation between mass transfer and corrosion reaction, the relation between the vapour-liquid two-phase flow pattern and the corrosion rate and production and breakage mechanism of a corrosion product membrane and the critical characteristic of the breakage. The high-speed rotation is realized and meanwhile, and the good sealing property is ensured by adopting the magnetic rotating device.
Owner:NANJING UNIV OF TECH

Intelligent remote monitoring and regulating system for cathode protection of underground pipelines

ActiveCN104674229AFunctionalRemotely adjust the frequency of data collectionGeneral Packet Radio ServiceEngineering
An intelligent remote monitoring and regulating system for cathode protection of underground pipelines comprises an intelligent test pole (1) equipped with a polarized probe, a constant potential rectifier (3) equipped with a constant potential rectifier intelligent measurement and control device, a transmission channel formed by electrically connecting the constant potential rectifier (3) and an underground steel pipeline (2) and used for inputting electrical parameters, as well as a monitoring host system comprising a server (7) of a remote monitoring and management system and intelligent terminals such as a computer, a tablet personal computer, a mobile phone and the like which are arranged in a monitoring center, an intelligent collecting processing and transmission system for measured data and control data is formed by a GPRS (general packet radio service) wireless network (5), the server (7) and the monitoring host system (8), and meanwhile, the remote real-time monitoring and detection system with functions of accurate positioning and time service is formed by an intelligent measurement and control device arranged in the intelligent test pole (1) and the constant potential rectifier intelligent measurement and control device matched with the constant potential rectifier (3) through a satellite positioning system (6).
Owner:CHINA SINOPEC PIPELINE STORAGE & TRANSPORTATION CO LTD +1

Device and method for quickly measuring BOD (biochemical oxygen demand) based on microbial electrolysis cell technology

The invention discloses a device and method for quickly measuring a BOD (biochemical oxygen demand) based on a microbial electrolysis cell technology. The device adopts a microbial electrolysis cell structure and comprises a microbial electrolysis cell, a data acquisition system and a record cell, wherein the microbial electrolysis cell takes conductive inert materials as an anode electrode and a cathode electrode which are connected with each other through a titanium wire, a potentiostat and a resistor; the data acquisition system is connected in parallel with the resistor; the record cell is connected with the data acquisition system. The method comprises the following steps of: adding a BOD contained sample into the microbial electrolysis cell; measuring electrochemical signals generated by the microbial electrolysis cell; and determining the BOD of the sample according to the relation between the BOD concentration and the size of the electrochemical signals (indicating the maximum current and coulomb quantity) generated by the microbial electrolysis cell. The device and the method have the advantages of high sensitivity, wide linearity range, short detection time, and the like, can be used for measuring the BOD of sewage in an on-line or off-line manner.
Owner:INNER MONGOLIA UNIV OF SCI & TECH

Apparatus and method for assessing subgrade corrosion

An apparatus and method for assessing subgrade corrosion is disclosed. The apparatus is configured to assess soil corrosivity and subgrade corrosion of a structure without disturbing the site where the structure resides and includes a probe having a plurality of electrodes and sensors configured to conduct environmental and corrosion measurements at the site, and a controller having a potentiostat contained therein to determine a corrosion rate at the site, wherein the corrosion rate provides an indicator of the amount of corrosion of the structure over time.
Owner:ELECTRIC POWER RES INST INC

Intelligent chemical analysis system for liquid sample

The invention relates to a detector generally known as an electronic tongue and provides an intelligent chemical analysis system which is based on electrochemical detection and used for telling the differences of the global properties of liquid samples. The present electronic tongue has the defects of weak response, complex processing method of back-end data, relatively difficult extraction of useful information, etc. The technical proposal of the invention comprises a sensor array, a signal motivation and collection device and an intelligent analysis unit; wherein, the sensor array consists of a working electrode, an auxiliary electrode and a reference electrode; the signal motivation and collection device which comprises a single chip microcomputer and a constant potential rectifier adds the predetermined excitation pulse arrays to the auxiliary electrode and at the same time collects the response signals generated by the working electrode; the intelligent analysis unit comprises a host computer of the signal motivation and collection device and the intelligent data analysis software. The detector can realize the nondestructive, timely and fast intelligent detection of global properties of the liquid samples and the overall quality characteristic analysis and is particularly suitable for the detection of quality control in the production processes of enterprises.
Owner:ZHEJIANG GONGSHANG UNIVERSITY

Method for detecting individual oxidant species and halide anions in a sample using differential pulse non-stripping voltammetry

Method for electrochemically detecting different oxidant and halide anion species in a sample. According to one embodiment, the method uses a sensor including a boron-doped diamond working electrode, a platinum mesh counter electrode, a silver / silver chloride reference electrode, a potentiostat coupled to the three electrodes, and a computer coupled to the potentiostat. The sensor measures current resulting from differential pulse non-stripping voltammetry, thereby enabling different oxidants and halide anions from a plurality of such species to be detected by distinct responses. Peaks in the current signal result at characteristic voltages when a species is oxidized to a higher oxidation state, and the concentration of a particular species is determined by the magnitude of the current peak. The sensor response time is rapid and shows high sensitivity and selectivity for oxidants and halide anions. The sensor may be a hand-held or in-line device and may be used in a feedback-control system.
Owner:GINER INC

Large range long distance cathodic protection system and working method thereof

The invention relates to a large range long distance cathodic protection system which comprises a control center, constant potential rectifiers and intelligent potential collectors. A plurality of constant potential rectifiers and intelligent potential collectors are arranged. The control center is internally provided with a potential regulating system and a memory. The large range long distance cathodic protection system is provided with the constant potential rectifiers and an output unit connected with the constant potential rectifiers. The constant potential rectifiers are arranged along a protective line pipe. Output number of the constant potential rectifiers is great so that the cathodic protection is long in distance and uniform in protection. According to the large range long distance cathodic protection system provided by the invention, the output potential can be automatically adjusted, and the adjusting error is small. Automatic adjustment is realized, so that the cathodic protection at each monitoring point on the whole line pipe meets the standard or most monitoring points meet the standard.
Owner:QINGDAO YAHE SCI & TECH DEV

Soil heavy metal detector based on urease biosensor

The invention provides a soil heavy metal detector based on a urease biosensor. The soil heavy metal detector comprises a system control module, a potentiostat module, a signal acquisition and processing module, the urease biosensor and a serial port communication module, wherein the potentiostat module is used for providing stable constant potentials to a reference electrode and a working electrode of the urease biosensor, the signal acquisition and processing module is used for acquiring current signals generated in a substrate by the urease biosensor, performing current-to-voltage conversion, filtering, amplification and analog-digital conversion in sequence on the current signals, and then sending the signals to the system control module, the received digital signals are processed under the control of the system control module so as to obtain a soil heavy metal detection result, and the serial port communication module is used for sending the detection result to an upper computer. The soil heavy metal detector can be used for detecting heavy metal in soil quickly and accurately, and the cost and the operation complexity are lowered.
Owner:CHINA AGRI UNIV

Electro-active sensor, method for constructing the same; apparatus and circuitry for detection of electro-active species

An electro-active sensor includes a nonconductive platform with a first electrode set attached with a first side of a nonconductive platform. The first electrode set serves as an electrochemical cell that may be utilized to detect electro-active species in solution. A plurality of electrode sets and a variety of additional electrochemical cells and sensors may be attached with the nonconductive platform. The present invention also includes a method for constructing the aforementioned electro-active sensor. Additionally, an apparatus for detection and observation is disclosed, where the apparatus includes a sealable chamber for insertion of a portion of an electro-active sensor. The apparatus allows for monitoring and detection activities. Allowing for control of attached cells and sensors, a dual-mode circuitry is also disclosed. The dual-mode circuitry includes a switch, allowing the circuitry to be switched from a potentiostat to a galvanostat mode.
Owner:CALIFORNIA INST OF TECH

Device for Measuring at Least One Property of Water

The invention relates to a device for measuring at least one physico-chemical parameter of water, said device including a means for measuring the concentration of active chlorine in the form of hypochlorous acid HOC1 in said water. According to the invention, said means for measuring the chlorine concentration in the form of hypochlorous acid HOC1 includes first (21) and second (22) amperometric sensors for detecting chlorine in the form of hypochlorous acid HOC1, each outputting a signal, said two amperometric chlorine sensors (21, 22) having a single common reference electrode (25) and being connected to a double potentiostat, characterised in that said invention includes a means for simultaneously implementing said first (21) and second (22) amperometric sensors, and in that said invention includes a means for measuring a difference between the signals output by said two sensors (21, 22).
Owner:VEOLIA WATER SOLUTIONS & TECH SUPPORT

Miniaturized sub-nanoampere sensitivity low-noise potentiostat system

A miniaturized sub-nanoampere sensitivity low-noise potentiostat system is disclosed herein. The system includes an adjustable bias analog front end / potentiostat, a plurality of high input impedance and high gain difference amplifiers, means for signal filtering, a high-resolution analog-to-digital converter, and a sampling algorithm.
Owner:BIOLINQ INC

Annulus biological membrane electrode electrochemical device and application thereof

The invention provides an annulus biological membrane electrode electrochemical device and application thereof. The device comprises: a cylindrical reaction chamber; an annulus membrane electrode arranged inside the reaction chamber, wherein the annulus membrane electrode comprises an anode, a diaphragm and a cathode in sequential contact, the annulus membrane electrode separates the reaction chamber into an anode chamber and a cathode chamber, a phycomycete biological membrane is attached to the surface of the cathode, and an electroactive bacteria biological membrane is attached to the surface of the anode; an annular fixing frame for fixing the annulus membrane electrode; an anode column arranged inside the anode chamber; a cathode partition plate arranged inside the cathode chamber; an anode partition plate arranged inside the anode chamber, wherein an anode water inlet is formed in the lower part of the anode chamber, an anode water outlet is formed in the top of the anode chamber, a cathode water inlet communicated with the anode water outlet is formed in the top of the cathode chamber, and a cathode water outlet is formed in the lower part of the cathode chamber; and an adjustable resistor and a potentiostat, connected with the cathode and the anode. The device is high in degree of integration, low in energy consumption, and low in operating cost, and can strongly remove organic pollutants, nitrogen compounds and heavy metals in breeding wastewater.
Owner:GUANGDONG UNIV OF TECH +1

Tube cathode protection inspection and monitoring system

The invention relates to a tube cathode protection inspection and monitoring system, comprising a cathode protection data monitoring center, at least one first wireless intelligent telemetering terminal, and a plurality of second wireless intelligent telemetering terminals, wherein the cathode protection data monitoring center is used for receiving, analyzing and storing data sent by wireless intelligent telemetering terminals installed in a pipe network and providing an underground pipe network cathode protection system security monitoring service for a client; the at least one first wireless intelligent telemetering terminal is installed on the pipe network, is connected with a constant potential rectifier and is used for detecting U+ voltage signals, I+ current signals, RE electric potential signals and SR given potential signal parameters of the cathode protection system of the constant potential rectifier, and the plurality of second wireless intelligent telemetering terminals are installed on the pipe network, are connected with test posts and are used for detecting the cathode potential and power-failure potential parameters of the test posts. The tube cathode protection inspection and monitoring system provided by the invention is mainly used for solving the technical problems that the manual poling labor intensity is large, the cost is high, and the poling precision is low; according to the tube cathode protection inspection and monitoring system, the stray current influence and electromagnetic interference on an underground pipe network can be eliminated, and the U+, I+, RE and SR parameters of the cathode protection system can be immediately, correctly and completely monitored.
Owner:SHENGLONG PETROLEUM PIPE DETECTION TECH

Method for checking enamel scale explosion resistance of cold-rolled steel plate

The invention relates to a method for checking the enamel scale explosion resistance of a cold-rolled steel plate. The method comprises the following steps of: cleaning a test sample; fastening the test sample between an electrolytic cell A and an electrolytic cell B; controlling temperature of electrolyte at 30+ / -0.5 DEG C; pouring the electrolyte into the electrolytic cell B; keeping the test sample at an oxidation potential of hydrogen by using a potentiostat when Pt and the test sample serve as a cathode and an anode respectively; when residual current falls below 1.5 microamperes, pouring another electrolyte into the electrolytic cell A; when the Pt and the test sample serve as an anode and a cathode respectively, switching on the potentiostat immediately and charging hydrogen to the test sample; and when the current of the anode is stabilized for 8 to 30 minutes, stopping the experiment and calculating to obtain a TH value. By the checking method, the equipment is simple, easy in operation and high in sensitivity and stability; moreover, an experimental solution is nontoxic, safe and environment-friendly, so a great economic benefit and an obvious social benefit are brought in.
Owner:武钢集团有限公司

Automated self-compensation apparatus and methods for providing electrochemical sensors

Systems and methods for automated self-compensation are described herein. Accordingly, some embodiments of a method may include measuring a signal from an electrochemical sensor device, where the signal relates to the presence of a predetermined gas, and where the electrochemical sensor device includes a potentiostat, measuring an internal property of the electrochemical sensor device by electronically pinging the potentiostat, and receiving a response from the potentiostat. In some embodiments, the method may include interpreting the response through an associative relationship between the electrochemical sensor device and a data acquisition and calculation module, determining an effect of an environmental factor from the response, compensating for effects of the environmental factor by adjusting the signal from the electrochemical sensor device and outputting the adjusted signal.
Owner:SENSIRION AG

Potentiostat circuit

A potentiostat is provided for a biosensor circuit and permits sequential and simultaneous measurements to be performed at different cells across a matrix of biosensing devices. Accordingly, a potentiostat comprises a first differential amplifier for receiving a scanning voltage at a first input terminal and a voltage at the reference electrode at a second input terminal and for generating an output voltage at an output terminal to be applied to the working electrode, wherein, when in use, a feedback loop of the potentiostat circuit is closed between the reference electrode and the working electrode.
Owner:SEIKO EPSON CORP
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