The timed group can be quantified according to the calibration curve of another single compound or timed group. The software allows you to use the response factor of a reference calibration curve. In this case a correction factor (Ref. correction) can be entered to multiply the response before the amount is calculated from the response factor of the reference compound or group.
The calibration curve of a timed group is available as a reference only if its curve model is Linear and the curve is forced through the origin. In case of ISTD same ISTD is used as reference compound.