PPT-Reference Electrodes Materials Engineering

Dr Lubna Ghalib Hydrogen Electrode The hydrogen electrode is used as a reference for electrode potential measurements Theoretically it is the most important electrode for use in aqueous solutions The reversible hydrogen electrode in a solution of hydrogen ions at unit activity exhibits a potential which is assumed to be zero at all temperatures The electrode consists of a platinum wire immersed in a solution containing hydrogen ions and saturated with hydrogen gas Platinum is immersed completely in aqueous arsenic free hydrochloric acid and hydrogen gas free from oxygen and carbon monoxide is bubble and the reversible potential is achieved Unfortunate this electrode has some drawbacks First the reversibility of hydrogen electrode cannot be maintained in oxidizing media Second if a current is withdrawn from the electrode the electrode acts an anode because of the ionization of gas molecules Figure 14. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 11 . – . Iron and steel. wikipedia. Iron and steel. EMMAT101A Engineering Materials and Processes. Reference Text. Keri Brophy-Martinez. Designs in Instrumentation. Electrochemistry. Electrochemistry. Basic principle. Electrodes are used to selectively measure particular ions. Instruments utilizing electrodes measure the potential difference (charge) that builds up at an interface when two different . Materials for Electrochemical Energy Conversion. Part . 4. Materials for . Li ion . rechargeable batteries. Truls Norby. Overview of this part of the course. What is electrochemistry?. Types of electrochemical energy conversion devices. Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 22 . – . Glasses. Glasses. EMMAT101A Engineering Materials and Processes. Reference Text. Section. Higgins RA & Bolton, 2210. .  . Le . Gall. 1. , A., . V. Ciarletti. 1. , . M. Hamelin. 1. , R. Grard. 2.  . 1. Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Université Versailles Saint-Quentin (UVSQ), Paris, France, . Associate Degree of Applied Engineering . (Renewable Energy Technologies). Lecture . 7 . – . Mechanical shaping of metals. Mechanical Deformation of Metals. EMMAT101A Engineering Materials and Processes. Lecture . 20 . – . Properties of plastics. Properties of plastics. Engineering Materials and Processes. Reference Text. Section. Higgins RA & Bolton, 2010. . Materials for Engineers and Technicians, . Lecture . 12 . – . The heat-treatment of plain-carbon steels. High Carbon Steel is used in springs. http://cnhuaxing.en.made-in-china.com. The heat-treatment of plain-carbon steels. Engineering Materials and Processes. Announcements I. Homework Set 1.3 Solutions Posted (no problems will be collected). Exam 1. Mar. . . 7. th. Will review topics on Thursday. Will cover all electronics topics and electrochemistry (Ch. 13 most or all of Ch. 14). 1. Lecture 2. If metals are the only useful materials for constructing indicator electrodes, then there would be few useful applications of . potentiometry. . In 1901 , Haber Fritz discovered the existence of a change in potential across a glass membrane when its two sides are in solutions of different acidity. The existence of this membrane potential led to the development of a whole new class of indicator electrodes called ion-selective electrodes (ISEs). . Hamilton SUS pH electrodes. Quality Declaration :. All sensors delivered with Quality Declaration. The Quality Declaration contains all information needed for start-up. Hamilton SUS pH electrodes. Quality Declaration . Interpretation of Data 1 Certified values listed below reflect analysis results submitted by qualified analytical laboratories using a combination of methods and instrumentation that emulate actual me POTENTIOMETRIC ELECTRODES AND POTENTIOMETRY. Ch.13. In this chapter. Understand the concept of the various types of electrodes that can be used for measuring solution potentials.. How to select the proper one for measuring a given . Assistant Professor,. ECE . Deptt.,UIET,CSJM. University. Introduction. In observing the measurement of ECG or the some other form of bioelectric potential, a conclusion could easily be reached that the measurement electrodes are simply electrical terminals or contact points from which the voltage can be obtained at the surface of the body..