# ion selective electrode

> sensor that converts the activity of a specific ion dissolved in a solution into an electrical potential

**Wikidata**: [Q2477607](https://www.wikidata.org/wiki/Q2477607)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Ion-selective_electrode)  
**Source**: https://4ort.xyz/entity/ion-selective-electrode

## Summary
An ion selective electrode (ISE) is a sensor that converts the activity of a specific ion dissolved in a solution into an electrical potential. It functions as a subclass of an electrode, which is an electrical conductor used to make contact with a nonmetallic part of a circuit. This device is also known as a specific ion electrode or SIE.

## Key Facts
*   **Definition:** An ion selective electrode is a sensor that converts the activity of a specific ion dissolved in a solution into an electrical potential.
*   **Parent Class:** It is a subclass of an **electrode** (an electrical conductor used to make contact with a nonmetallic part of a circuit).
*   **Acronyms & Aliases:** It is also referred to as ISE, SIE (specific ion electrode), ion-selective electrode, and electrodo para iones específicos.
*   **Specific Types:** Examples of this technology include the **Fluoride selective electrode** and the **Potassium selective electrode**.
*   **Related Concepts:** The **pH electrode** is classified as a parent or related class within this hierarchy.
*   **Standard Identifiers:** The entity has a MeSH Descriptor ID of **D017736** and an IUPAC Gold Book ID of **I03244**.
*   **Classification Codes:** It holds a MeSH Tree Code of **E07.305.250.471** and a GND ID of **4072918-7**.

## FAQs
### Q: What is the primary function of an ion selective electrode?
A: The primary function of an ion selective electrode is to act as a sensor that converts the activity of a specific ion dissolved in a solution into an electrical potential.

### Q: What are the alternative names for an ion selective electrode?
A: This sensor is commonly abbreviated as **ISE** or **SIE**. It is also referred to as a "specific ion electrode" or "ion-selective electrode."

### Q: How is an ion selective electrode classified?
A: It is classified as a subclass of an **electrode**, defined broadly as an electrical conductor used to make contact with a nonmetallic part of a circuit (such as a semiconductor, electrolyte, or vacuum).

## Why It Matters
The ion selective electrode is significant because it serves as a fundamental transducer that converts chemical information—specifically the activity of ions in a solution—into an electrical signal. By bridging the gap between ionic chemistry and electrical measurement, it allows for the quantification of specific substances within a liquid environment.

As a recognized subclass of electrodes, it plays a specialized role distinct from general electrical conductors. Its ability to target "specific ions" (such as fluoride or potassium) makes it a distinct category of sensor compared to more general measurement devices. The technology is established enough to be standardized in major scientific databases, including the IUPAC Gold Book and the MeSH (Medical Subject Headings) vocabulary, highlighting its relevance in chemical and medical fields.

## Notable For
*   **Specificity:** It is designed to measure the activity of a *specific* ion rather than general solution properties.
*   **Signal Conversion:** It uniquely converts chemical ion activity directly into electrical potential.
*   **Standardization:** It is a formally recognized concept in the IUPAC Gold Book (ID: I03244) and MeSH (ID: D017736).
*   **Hierarchy:** It acts as a parent class for specific technologies like the Fluoride selective electrode and Potassium selective electrode.

## Body

### Definition and Operating Principle
The ion selective electrode (ISE) is a sensor categorized as a subclass of an electrode. Its core function is to convert the activity of a specific ion dissolved in a solution into an electrical potential. This allows for the translation of chemical data into electrical signals.

### Classification and Hierarchy
In the hierarchy of scientific instruments, the ion selective electrode falls under the class of **electrode**. An electrode is defined as an electrical conductor used to make contact with a nonmetallic part of a circuit, such as a semiconductor, an electrolyte, or a vacuum. The **pH electrode** is also listed as a related parent class.

### Variants and Related Entities
The knowledge entry identifies specific implementations of the ion selective electrode, including:
*   **Fluoride selective electrode**
*   **Potassium selective electrode**

### Identifiers and Taxonomy
The entity is indexed under various international scientific and library systems:
*   **IUPAC Gold Book ID:** I03244
*   **MeSH Tree Code:** E07.305.250.471
*   **MeSH Descriptor ID:** D017736
*   **GND ID:** 4072918-7
*   **UMLS CUI:** C0206189
*   **Wolfram Language Entity Code:** Entity["MeasurementDevice", "IonSelectiveElectrode"]

## References

1. Freebase Data Dumps. 2013
2. UMLS 2023
3. [OpenAlex](https://docs.openalex.org/download-snapshot/snapshot-data-format)