In the Thin Layer Chromatography Procedure for Drug Screening,the Retention

Multiple Choice

In the thin layer chromatography procedure for drug screening,the retention factor (R_f) value for a compound is given by the:

A) ratio of distance moved by the unknown solute to distance moved by the solvent in the mobile phase.
B) rate of movement of the mobile phase through the adsorbent compared with standards and controls.
C) measurement in centimeters of the distance the solute moved in the mobile phase from the point of application.
D) distance moved by the mobile phase front from the point of application compared with a control.