- Capacity factor
- k prime
Capacity factor defines interaction with the sorbent or retention in chromatography. The earliest eluting peak of interest should have a k' of 1 or better. The ideal is 2 or better.
For additional information see WAT038216 - HPLC COL THEORY TECH/PRACTICE BOOK, by Uwe D. Neue.
For practical examples, see John Dolan LC-GC articles: