- Start p/v and end p/v are not being calculated in Empower 3
- Empower 3
The baseline is flat at 0.
FIX or WORKAROUND
Three things are necessary for calculation of start and end p/v:
- System Suitability must be enabled for the project.
- Either European or All must be selected for the Pharmacopeia type.
- The baseline at the start or end of the peak must not be 0.
The following formula is used to calculate the p/v value:
Start p/v = (height / height start)
End p/v = (height / height end)
height = height of the peak
height start = valley height at the start of the peak
height end = valley height at the end of the peak
Based on this formula, if the baseline/height start/height end is 0, then the denominator in the formula is 0, which cannot be. Consequently, you do not get a value for p/v.
Enable Calculate Detector Noise and Drift in the Noise and Drift tab of the processing method.