Definition

1. Noun:
   • A chemical separation process: "elution" refers to the process of extracting one material from another by washing it with a solvent. This solvent removes (elutes) a substance that is adsorbed or bound to a solid material, such as a resin or gel.
   • A technique in chromatography and ion exchange: Specifically, it is the step where the desired compound is washed out of the column or medium using a liquid (the eluent).

Usage

• General Use: The term is primarily used in scientific contexts, especially in chemistry, biochemistry, and chemical engineering.
• Typical Contexts: Describing laboratory procedures, industrial purification processes, or analytical techniques.

Examples

• Noun:
  • The elution of the protein was monitored using a UV detector.
  • In this experiment, we will use a salt gradient for the elution of the captured ions.
  • The purity of the final product depends on the efficiency of the elution step.

Advanced Usage

• "Isocratic elution": A chromatography technique where the composition of the solvent (eluent) remains constant throughout the process.
  • Isocratic elution is simpler but sometimes less effective than gradient elution for separating complex mixtures.
• "Gradient elution": A technique where the composition of the eluent is changed gradually during the process to improve separation.
  • Gradient elution was employed to separate the various components of the plant extract.
• "Elution profile": A graph showing how much of a substance comes out (elutes) over time during the process.
  • The elution profile showed two distinct peaks, indicating two separate compounds.

Variants and Related Words

• Elute (verb): To extract (a substance) from a solid medium by washing it with a solvent.
  • The antibody was eluted from the column using a low-pH buffer.
• Eluent (noun): The solvent or solution used to carry out the elution process.
  • The chosen eluent must effectively dissolve the target compound.
• Eluate (noun): The solution that results from the elution process, containing the extracted material.
  • The collected eluate was then analyzed for uranium concentration.

Synonyms

• Washing out: A more general, less technical term for removing a substance by flushing with liquid.
• Desorption: The process of a substance being released from a surface it was attached to; elution often involves desorption.
• Extraction: A broader term for removing a component from a mixture; elution is a specific type of extraction.

Related Phrases

• "Elution volume": The specific amount of eluent that passes through a column before a particular compound emerges.
  • The compound of interest had an elution volume of 15 milliliters.
• "Elution time" / "Retention time": The time it takes for a specific substance to elute from a chromatography system.
  • The analyte's elution time was consistent with the standard.
• "Step elution": A method where the eluent composition is changed in abrupt steps rather than a smooth gradient.
  • Step elution can be a quicker method for purifying a single target molecule.

Noun

1. the process of extracting one material from another by washing with a solvent to remove adsorbed material from an adsorbent (as in washing of loaded ion-exchange resins to remove captured ions); used to obtain uranium ions