How does a sodium ion selective electrode work?
An ion selective electrode generates a difference in electrical potential between itself and a reference electrode. The output potential is proportional to the amount or concentration of the selected ion in solution. The concentration is a measure of the number of ions in a specific volume.
What is the most common ion-selective electrode?
Ion-exchange resin membranes Ion-exchange resins are based on special organic polymer membranes which contain a specific ion-exchange substance (resin). This is the most widespread type of ion-specific electrode. An example is the potassium selective electrode, based on valinomycin as an ion-exchange agent.
What is sodium electrode?
Introduction. The Sodium Ion-Selective Electrode has a solid-state PVC polymer matrix membrane. The electrode is designed for the detection of sodium ions (Na+ ) in aqueous solutions and is suitable for use in both field and laboratory applications. The Sodium Ion is a monovalent cation.
What are the characteristics of ion-selective electrode?
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 are the components of ion-selective electrode?
The three main components of making a measurement at an ISE are an inner reference, or standard, solution and an outer analyte, or sample, solution separated by a thin membrane.
What is ion-selective electrode method?
Ion selective electrode (ISE) is an analytical technique used to determine the activity of ions in aqueous solution by measuring the electrical potential. It is a real-time measurement, which means it can monitor the change of activity of ion with time. It can determine both positively and negatively charged ions.
What is liquid based ion-selective electrode?
In chemical analysis: Ion-selective electrodes. Liquid-ion-exchanger electrodes utilize a liquid ion exchanger that is held in place in an inert, porous hydrophobic membrane. The electrodes are selective because the ion exchangers selectively exchange a single analyte ion.
What is the principle of ion selective electrode?
Principle of ion-selective electrode (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 does Ion Selective Electrode measures?
An Ion selective electrode is a sensor which converts the activity of a specific ion (dissolved in a solution) into a voltage (potential), which can be measured by a mV or Ion meter. The voltage is theoretically dependent on the logarithm of the ion activity, as described by the Nernst Equation.
Which of the following ion-selective electrode consists of gas permeable membrane?
Which of the following ion-selective electrode consist of gas permeable membrane? Clarification: Glass pH electrode consists of gas permeable membrane selective for CO2, NH3 or H2S.
What are ion selective electrodes give examples?
The most important ion-selective electrodes for pH determination are glass electrodes, liquid membrane electrodes, and ion-sensitive field-effect transistors (ISFETs). Glass pH electrode. The glass pH electrode used to measure water acidity is the most common example of an ion-selective electrode.
What are ion-selective electrodes used for?
This paper will familiarize the reader with the terms used to describe the behavior of ion-selective electrodes, particularly in relation to their use in clinical chemistry for determination of blood electrolyte cations.
How accurate are ion-selective electrodes for measurement of Na+ and K+?
We compared different sample-handling techniques for measurement of Na+ and K+ with ion-selective electrodes (ISE). Imprecision was less for venous blood (with a minimum of heparin) than for plasma, serum, or capillary blood. The results for K+ were higher for serum than for whole blood, and higher for whole blood than for plasma.
What is the Ise of Metrohm ion-selective sodium electrodes?
The construction, working principles, and areas of application of the two Metrohm ion-selective sodium electrodes – the 6.0501.100 Glass membrane ISE and the 6.0508.100 Polymer membrane ISE – are explained in detail.
How do you determine sodium with the sodium Ise?
The determination of sodium with the sodium ISE represents a selective, rapid, accurate, and favorably-priced method which is described in this Bulletin. Examples are used to show how determinations can be carried out with the 692 pH/Ion Meter using either direct measurement or the standard addition technique.