What is ion selective membrane?
These membranes allow the selective migration of ions while retaining water molecules. The driving force for the ion transport is a difference in free energy between the high saline and low saline solutions. This transport will continue until the equilibrium is reached where the chemical potential of salts is equal.
How does ion selective membrane work?
Working Mechanism The ion-selective electrode works based on the principle of a galvanic cell. The transport of ions from an area of high concentration to low concentration, through the selective binding of ions with the specific sites of the membrane, creates a potential difference.
What are the uses of ion selective electrode?
Ion-selective electrodes (ISEs) are very similar in use to pH electrodes. They are used for chloride, potassium, calcium, carbon dioxide/carbonate, oxygen, and a variety of other ions. These methods are particularly suited for field analysis and online measurements.
What is ISE in biochemistry?
Ion selective electrode (ISE) is an analytical technique used to determine the activity of ions in aqueous solution by measuring the electrical potential. It can determine both positively and negatively charged ions.
Are ion selective membranes porous?
Different liquids may be used for measurements. As mentioned above, ion exchange membranes are not typical porous materials – in the sense that their structure depends on the water activity.
What is the principle of the ion selective methods?
Principle of ion-selective electrode (I.S.E.) An ideal I.S.E. consists of a thin membrane across which only the intended ion can be transported. The transport of ions from a high conc. to a low one through a selective binding with some sites within the membrane creates a potential difference.
What is Ion Selective Electrode give example?
Ion-selective electrode sensors have been classified according to the membrane type and include the following electrode classifications: (1) homogeneous crystalline membrane electrodes (e.g., LaF3 for F−, Ag2S for Ag+ or S2−, AgCl/Ag2S for Cl−); (2) heterogeneous crystalline membrane electrodes (e.g., silicone rubbers …
What are the characteristics of ion selective electrodes?
Explanation: Ion selective electrodes have wide concentration range. It is highly selective to a particular ion. 8. Ion selective electrode are unaffected by colour or turbidity of the solution.
What ISE principle?
What are the characteristics of ion-selective electrodes?
Why glass electrode is called an ion-selective electrode?
Glass electrodes are ion-selective electrodes based on the chemical properties of a glass membrane of defined chemical composition. Conduction within the dry glass is due to the cation of lowest charge and is not related to penetration by a substantial amount of cations. FIGURE 16.