What IS an ISE Meter?
An ion-selective electrode (ISE) is a type of sensor used to determine the concentration of specific ions in an aqueous solution by converting the activity of that ion into an electrical potential which can be measured by a voltmeter. ISE is an important element of water quality analysis.
What IS ISE in water testing?
The ion selective electrode (ISE) is a useful and versatile sensor for testing ions in various types of samples, such as environmental, agricultural, industrial, biotechnical, pharmaceutical, food, wastewater, drinking water, and others.
How does ion meter work?
The ion meters are devices used for measurements of specific ions in the water with use of an ion selective electrode. In most cases the ion meters enable also simultaneous measurements of pH, mV and temperature, as this additional functions are needed during the ions measurements.
How does an ion selective electrode work?
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 is the principle of ISE?
PRINCIPLE: An Ion-Selective Electrode (ISE) makes use of the unique properties of certain membrane materials to develop an electrical potential (electromotive force, EMF) for the measurements of ions in solution.
What is the difference between direct and indirect ISE?
Direct ISE is the technique employed in blood gas and most other point-of-care analyzers whereas indirect ISE is used in the majority of biochemistry profiling analyzers sited in central laboratories.
What is the basic principle of an ISE?
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.
Why do ISE’s only work at dilute concentration ranges?
The number of effective ions is called the activity of the solution. It is therefore reasonable to assume that the electrode will measure the activity rather than the finite concentration of the ions. This is why dilute samples are preferred for measurement with ISE’s.
What is the main difference between direct and indirect ion selective electrode?
1 Direct methods, usually an ion selective electrode (ISE), directly analyse the specimen, whereas indirect methods, most commonly ISE but also flame photometry, do so indirectly by diluting the specimen before analysis.
What is Nernstian response?
Nernstian response : An electrode is said to have a Nernstian response over a given concentration range if a plot of the potential difference (when measured against a reference electrode) versus the logarithm of the ionic activity of a given species in the test solution, is linear with a slope factor which is given by …
What can be measured by an Ise meter?
Depending upon the electrode, ISE meters are capable of identifying and measuring the concentration of a wide variety of chemical elements or compounds including fluoride, bromide, cadmium, and gases in solution such as ammonia, carbon dioxide, and nitrogen oxide.
Which is Thermo Scientific benchtop pH and Ise meter?
Perform your routine pH and ion concentration (ISE) measurements with Thermo Scientific Orion benchtop pH and ISE meters. Orion ISE benchtop and portable meters are designed to deliver the features and functionality you look for in a lab or field instrument:
What do you need to know about Orion Ise meters?
Orion ISE benchtop and portable meters are designed to deliver the features and functionality you look for in a lab or field instrument: Easy-to-use features that maximize productivity and minimize training time A wide selection of benchtop meters meet your application requirements and budget
