To get comparable retention between a partitioning run and a competitive run, divide the partition coefficient for the partitioning run by the concentration of stationary sites. For example, if the partitioning partition coefficient for A is 0.1 and the concentration of stationary sites is 10 equiv/L, then divide the partition coefficient by 10 equiv/L to get the competitive partition coefficient, P(A)=0.01.
For a faster and more complete version of this program try: Programmed HPLC Simulator.
Introduction to HPLC Simulator discusses the theory and applications of the program.
Colby College Chemistry, Thomas W. Shattuck