Terms Referring to the Retention of Analytes

The average flow velocity of gas (u) The ratio of the column length, L, to the non-retained carrier gas hold-up time in the column, tM is the average flow velocity of gas  

The retention volume (Vr) The retention volume is defined as follows  

The mobile phase volume or dead volume (Vm) The mobile phase volume (often called dead volume) is defined in the same way as Vr  

The adjusted retention volume (Vr) This is the retention volume of an analyte minus the retention volume for the non-retained peak, expressed as  

The column capacity fax tor (k ) k is defined directly from the retention times  

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