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ACTIVITY ADSORBENT [1 record]

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Record 1 2011-05-31

English

Subject field(s)
  • Analytical Chemistry
DEF

In chromatography, a measure of adsorptive properties of an adsorbent which is established from the retention time (volume) of a standard substance for a given set of the operating conditions.

Key term(s)
  • activity of adsorbent

French

Domaine(s)
  • Chimie analytique
CONT

L'activité d'un adsorbant en CLS dépend de sa teneur en eau. Ainsi, le pourcentage d'eau de la phase stationnaire modifie la valeur du facteur de capacité, et partant, les qualités de la séparation.[...] Dans la pratique, il n'est pas conseillé d'utiliser des phases stationnaires trop activées, car des adsorptions irréversibles ou des réactions catalytiques peuvent se produire. Généralement, on désactive les phases stationnaires par addition d'un peu d'eau ou d'un solvant polaire [...]

PHR

Activité d'un adsorbant standard.

Spanish

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