ION EXCLUSION Meaning and
Definition
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Ion exclusion is a phenomenon in chemistry and liquid chromatography where certain ions are selectively excluded or prevented from entering the stationary phase of a chromatographic system. It is the process by which specific ions are rejected or excluded from the stationary phase, effectively preventing their separation and causing them to pass through the column or medium unretained. This exclusion occurs due to the repulsive interaction between the stationary phase and the ions.
In ion exclusion chromatography, the stationary phase typically consists of a cation-exchange resin, which has negatively charged functional groups. These functional groups repel and exclude cations from entering the stationary phase. Therefore, cations elute faster and are less retained than neutral or anionic species.
Ion exclusion is particularly useful for the analysis and separation of small organic acids, which are typically weak acids and exist predominantly in their anionic form. These weak acids are eluted in the void volume, along with uncharged or neutral solutes. By selectively excluding cations, ion exclusion chromatography provides a unique and efficient method for separating and analyzing weak acids.
Overall, ion exclusion is a crucial concept in the field of chromatography and chemical analysis. It involves the selective exclusion of certain ions from the stationary phase, leading to the separation and retention of particular species based on their charge and solute properties.
Common Misspellings for ION EXCLUSION
- uon exclusion
- jon exclusion
- kon exclusion
- oon exclusion
- 9on exclusion
- 8on exclusion
- iin exclusion
- ikn exclusion
- iln exclusion
- ipn exclusion
- i0n exclusion
- i9n exclusion
- iob exclusion
- iom exclusion
- ioj exclusion
- ioh exclusion
- ion wxclusion
- ion sxclusion
- ion dxclusion
- ion rxclusion
Etymology of ION EXCLUSION
The term "ion exclusion" is generally composed of two words, "ion" and "exclusion".
- "Ion" derives from the Greek word "ion", which means "going" or "that which goes". In the context of chemistry and physics, an ion refers to an atom or molecule that has gained or lost one or more electrons, resulting in a net electric charge. The term "ion" was first used in the early 19th century by English physicist and chemist Michael Faraday.
- "Exclusion" comes from the Latin word "exclusio", which means "a shutting out" or "expulsion". It is derived from the verb "excludere", which combines "ex" (meaning "out") and "cludere" (meaning "to shut"). "Exclusion" refers to the act of keeping something out or preventing its entrance or participation.
