Technical data

Understanding Your Agilent ChemStation 109
Integration
4
Integration Events
0.2% for GC. The initial area reject is set to zero and a trial integration is
performed. The trial is repeated several times if necessary, adjusting the
parameters each time until at least 5 peaks are detected or integration is
performed with an initial height reject of 0. The trial integration is terminated
if the above conditions are not met after 10 trials.
The results of the integration are examined and the peak width is adjusted
based on the peak widths of the detected peaks, biasing the calculation
towards the initial peaks. The peak symmetry of the detected peaks is used to
include only those peaks with symmetry between 0.8 and 1.3 for the peak
width calculation. If not enough symmetric peaks are found, this limit is
relaxed to minSymmetry/1.5 and maxSymmetry×1.5. The baseline between
the peaks is then examined to refine the earlier values of height reject & slope
sensitivity. The area reject is set to 90% of the minimum area of the most
symmetric peak detected during the trial integration.
The chromatogram is re-integrated using these final values for the integration
parameters, and the results of the integration are stored.
Autointegrate Parameters
The following parameters are set by the autointegrate function:
• Initial slope sensitivity
• Initial height
• Initial peak width
• Initial area reject