Journal club of the week: electro-chemical devices in the start and their application in medicine and toxicology

Journal club of the week: electro-chemical devices in the start and their application in medicine and toxicology
Speaker: Prof. Dr. P Norouzi
Date: In the 16th May 2016
Topic: electro-chemical devices in the start and their application in medicine and toxicology


In the 16th May 2016, journal club meeting, there was an invited guest Prof. Dr. P Norouzi who talked about novelties of electrochemistry specially in toxicology and pharmacology. The speaker introduced the electro-chemical devices in the start and their application in medicine and toxicology. An electro-chemical cell is a device capable of either generating electrical energy from chemical reactions or facilitating chemical reactions through the introduction of electrical energy. He gave some common example of an electrochemical cell that is a standard 1.5-volt cell meant for consumer use. A battery consists of two or more cells, connected in either parallel or series pattern. An electro-chemical cell consists of two half-cells. Each half-cell consists of an electrode and an electrolyte. The two half-cells may use the same electrolyte, or they may use different electrolytes. The chemical reactions in the cell may involve the electrolyte, the electrodes, or an external substance (as in fuel cells that may use hydrogen gas as a reactant). In a full electro-chemical device, species from one half-device lose electrons (oxidation) to their electrode while species from the other half-device gain electrons (reduction) from their electrode. Each half-cell has a characteristic voltage. Various choices of substances for each half-cell give different potential differences. He discussed some common reaction in the electro-chemical device that each reaction is undergoing an equilibrium reaction between different oxidation states of the ions: When equilibrium is reached, the cell cannot provide further voltage. In the half-cell that is undergoing oxidation, the closer the equilibrium lies to the ion/atom with the more positive oxidation state the more potential this reaction will provide. Likewise, in the reduction reaction, the closer the equilibrium lies to the ion/atom with the more negative oxidation state the higher the potential. The HYDRA ammonium analyzer from Electro-Chemical Devices uses ion specific electrodes to measure the concentration of dissolved ammonium in water. The HYDRA features an integrated, submersible sensor with a built-in spray cleaner to reduce maintenance. The Triton DO8 from electro-chemical Devices is an optical DO sensor using a fluorescence quenching method to determine the oxygen concentration in water. No sample preconditioning is required and the sensor may be used in submersible or inline applications. It has a range of 0-20 ppm. The Model CDA-22 is a panel mounted, ready to use chlorine dioxide analyzer. It is designed to monitor chlorine dioxide in drinking water, rinse water, cooling water or other fresh water samples from 0.05-20 ppm ClO2. All participants appreciate the speaker and asked questions. The professor answered all the questions in a good way and shared his own experiences.

 

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