Peak response
Signal from detector response that corresponds to analyte concentrations, usually represented in a form of peak. Sometimes, it is referred to as "peak size". It is used intentionally vague in USP methods to allow flexibility among different labs. It can be interpreted as the following,
- Peak area
- Peak height
- Relative change from a standard - e.g., assign the area from standard equals to 1.000 and compare your sample as % of 1.0000. Or peak height can be used.
Peak area is the prefer method but it requires well separated peaks. When peaks are not well resolved, peak height can be used.
Since each detector and system set up is different, the true analyte concentration is then calculated by using a detector response factor (F).