Technical reads

Technical readss from Comtest

What is Electrochemistry?

Electrochemists use electrical signals (DC voltage and current) to control and study chemical processes, hence the term electrochemistry. Placing a controlled signal on a chemical solution enables the chemist to determine the nature and concentration of an analyte (solid or liquid) or how the electrodes are responding in the chemical process. 

Potentiostats are popular instruments used for electrochemical studies using 3-electrode systems (Counter, Reference, Working) for investigations of reaction mechanisms related to the transfer of electrons between chemical species and other chemical phenomena. The system functions by maintaining the potential (voltage) of the working electrode at a constant level with respect to the reference electrode by adjusting the current at an auxiliary o5r counter electrode. Modern potentiostats are designed to interface with a personal computer and operate through a dedicated software package.

Keithley, represented locally by Comtest, has expanded their Potentiostat family of products, by introducing the new 2461-EC Potentiostat to the growing family of graphical touchscreen potentiostats.

Similar to the 2450-EC and 2460-EC, the 2461-EC is a versatile instrument particularly suited for research and development in fundamental electrochemistry, characterizing the next generation of materials and electrolytes, new energy storage devices, and cutting-edge sensors. In addition, the instrument can also be used in organic semiconductor materials research. 

The new EC-UPGRADE will enable existing users of the 2450, 2460, and 2461 source-measure units to upgrade to the potentiostat capabilities which includes scripts to run common electrochemical measurements.  Lastly, the electro-chemical scripts in all 24xx–EC instruments have been updated for easier test set-up and results.

This family of interactive solutions are a lower cost alternative to traditional electrochemistry potentiostats, provide more flexibility, and are easier to use for conducting a range of electrochemistry experiments including cyclic voltammetry, chronoamperometry, and chronopotentiometry. Their innovative graphical user interface (GUI) and advanced, capacitive touchscreen technology enable intuitive usage and minimize the learning curve for researchers, scientists, and students. 

Based on Keithley’s 2461 source-measure technology, the 2461-EC includes a 7 amp rated safety connector translator cable that connects to an electro-chemical test cell and preloaded with electrochemical measurement applications that utilize Keithley’s embedded Test Script Processor (TSP®) scripting technology.

Compared to the higher costs of traditional electrochemistry potentiostat instrumentation and measurement software that is typically uncustomizable, the 2461-EC’s built-in open source scripting enables electrochemists, chemists, and materials scientists to create libraries of reusable, customizable experimental software for running tests, including cyclic voltammetry, chronoamperometry, and chronopotentiometry. With the Touch Test Invent® user interface system, users can set up tests, run experiment, make measurements, generate graphical voltammogram plots, and perform immediate analysis without a computer (scope-like cursors, pinch and zoom, etc.,) enabling the them to make faster design and engineering decisions.

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