TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

RETENTION FACTOR [1 record]

Record 1 1999-04-12

English

Subject field(s)
  • Analytical Chemistry
CONT

The observed migration of a chromatographic zone relative to the flow of the wash liquid is called the R or the Rf value. Ranging from 0 for firmly sorbed substances to 1.0 for nonsorbed substances, the R value serves for the description, comparison, and identification of the separated materials.

OBS

Rf value should be written R[subscript]f.

Key term(s)
  • Rf

French

Domaine(s)
  • Chimie analytique
DEF

En chromatographie sur papier, rapport de la distance parcourue par une substance (acide aminé p. ex.) à la distance parcourue par le solvant dans le même temps.

OBS

Ce rapport, caractéristique de substance analysée, est en relation directe avec le coefficient de partage et permet une identification grossière des acides aminés présents dans le mélange.

OBS

La valeur Rf doit se lire R[indice]f.

Spanish

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