Elution

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Elution , rarely also elution (from the Latin eluere “to wash out”) describes in chromatography and environmental chemistry the detachment, leaching or displacement of adsorbed substances from adsorbents or ion exchangers .

In chromatography , the stationary phase can consist of both solid and liquid material. A mobile phase ( eluent ), which consists of one or more solvents , is led past the stationary phase. The mixture of solvents and dissolved substances discharged is the eluate .

In environmental chemistry and waste management - with water as a solvent - pollutants are extracted from waste under clearly defined conditions; these can be solid, pasty or muddy. The type and concentration of the eluted substances in the eluate are determined using suitable analytical methods.

Elution is also of particular importance in the production of radionuclides with the aid of radionuclide generators (e.g. Gallium-68 generator ).

Individual evidence

  1. Duden: eluieren , October 1, 2011.
  2. a b Entry on elution. In: Römpp Online . Georg Thieme Verlag, accessed on May 29, 2015.
  3. Duden: Eluat , October 1, 2011.