The statement is false because the retention factor is affected by temperature, amount of material, or time.
Chromatography is a method of separation which involves the use of two phases; a stationary phase and a mobile phase.
The stationary phase is usually the adsorbent column while the mobile phase is the eluting solvent containing the mixture.
The retention factor is the ratio of the distance moved by the mixture to be separated to the distance moved by the solvent alone.
The retention factor depends on the degree of interaction between the mobile phase and the stationary phase. This interaction may be affected by temperature, amount of material, or time.
In summary, the retention factor, Rf, is affected by temperature, amount of material, or time because it depends on the interaction of the mobile phase and the stationary phase.
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