Peak height
Detector response from analyte concentration that is directly proportional to the height of the peak. It is often used when peaks are not well resolved, i.e., R is less than 1.5. It is also used in LOD and LOQ when area calculations are imprecise or difficult to achieve.
Peak height is sensitive to the mobile phase flow rate and retention time. The peak height also changes when the peak shape change, e.g., tailing or over loading.
Since each detector and system set up is different, the true analyte concentration is then calculated by using a detector response factor (F).