Repeatability of Injection Precision

Repeatability assesses the performance of the HPLC system to ensure that there are no issues relating to the injector, the temperature, and the flow rate. It does not take into account any variance that may occur during or at the end of the run. In order to assess the system at these times, it is necessary to 

The capacity factor (k ) is a measure of retention time of the peak of interest (tf) proportional to the column void time (tf )—that is, the retention time for unretained material. The capacity factor is given by the following equation  

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